16639741642500 has 240 divisors, whose sum is σ = 53945765079360. Its totient is φ = 4434142176000.

The previous prime is 16639741642471. The next prime is 16639741642561. The reversal of 16639741642500 is 524614793661.

It is a happy number.

16639741642500 is a `hidden beast` number, since 1 + 6 + 6 + 3 + 9 + 74 + 1 + 64 + 2 + 500 = 666.

16639741642500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 96641487 + ... + 96813513.

It is an arithmetic number, because the mean of its divisors is an integer number (224774021164).

Almost surely, 2^{16639741642500} is an apocalyptic number.

16639741642500 is a gapful number since it is divisible by the number (10) 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 16639741642500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26972882539680).

16639741642500 is an abundant number, since it is smaller than the sum of its proper divisors (37306023436860).

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

16639741642500 is a wasteful number, since it uses less digits than its factorization.

16639741642500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173493 (or 173470 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 16639741642500 in words is "sixteen trillion, six hundred thirty-nine billion, seven hundred forty-one million, six hundred forty-two thousand, five hundred".