187220647796 has 144 divisors (see below), whose sum is σ = 420147995904. Its totient is φ = 71418267648.

The previous prime is 187220647763. The next prime is 187220647799. The reversal of 187220647796 is 697746022781.

It is a super-2 number, since 2×187220647796² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187220647799) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19779761 + ... + 19789223.

It is an arithmetic number, because the mean of its divisors is an integer number (2917694416).

Almost surely, 2^187220647796 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 187220647796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210073997952).

187220647796 is an abundant number, since it is smaller than the sum of its proper divisors (232927348108).

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

187220647796 is a wasteful number, since it uses less digits than its factorization.

187220647796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9650 (or 9635 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 59.

The spelling of 187220647796 in words is "one hundred eighty-seven billion, two hundred twenty million, six hundred forty-seven thousand, seven hundred ninety-six".