187664720539392 has 216 divisors, whose sum is σ = 542937049134480. Its totient is φ = 62340703764480.

The previous prime is 187664720539381. The next prime is 187664720539393. The reversal of 187664720539392 is 293935027466781.

It is a happy number.

187664720539392 is a `hidden beast` number, since 1 + 8 + 7 + 6 + 64 + 7 + 20 + 539 + 3 + 9 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 187664720539392.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187664720539393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5028376092 + ... + 5028413412.

It is a 1-persistent number, because it is pandigital, but 2⋅187664720539392 = 375329441078784 is not.

Almost surely, 2^{187664720539392} is an apocalyptic number.

187664720539392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 187664720539392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271468524567240).

187664720539392 is an abundant number, since it is smaller than the sum of its proper divisors (355272328595088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

187664720539392 is a wasteful number, since it uses less digits than its factorization.

187664720539392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44759 (or 44742 counting only the distinct ones).

The product of its (nonzero) digits is 823011840, while the sum is 72.

The spelling of 187664720539392 in words is "one hundred eighty-seven trillion, six hundred sixty-four billion, seven hundred twenty million, five hundred thirty-nine thousand, three hundred ninety-two".