16557612501660 has 96 divisors (see below), whose sum is σ = 49089836678400. Its totient is φ = 4155518788608.

The previous prime is 16557612501653. The next prime is 16557612501673. The reversal of 16557612501660 is 6610521675561.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39263247 + ... + 39682713.

It is an arithmetic number, because the mean of its divisors is an integer number (511352465400).

Almost surely, 2^{16557612501660} is an apocalyptic number.

16557612501660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16557612501660 is an abundant number, since it is smaller than the sum of its proper divisors (32532224176740).

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

16557612501660 is a wasteful number, since it uses less digits than its factorization.

16557612501660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458195 (or 458193 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 51.

The spelling of 16557612501660 in words is "sixteen trillion, five hundred fifty-seven billion, six hundred twelve million, five hundred one thousand, six hundred sixty".