16557377052 has 48 divisors (see below), whose sum is σ = 40987084320. Its totient is φ = 5184233472.

The previous prime is 16557377051. The next prime is 16557377063. The reversal of 16557377052 is 25077375561.

It is a junction number, because it is equal to n+sod(n) for n = 16557376992 and 16557377010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16557377051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24108 + ... + 183564.

It is an arithmetic number, because the mean of its divisors is an integer number (853897590).

Almost surely, 2^16557377052 is an apocalyptic number.

16557377052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16557377052 is an abundant number, since it is smaller than the sum of its proper divisors (24429707268).

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

16557377052 is a wasteful number, since it uses less digits than its factorization.

16557377052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159990 (or 159988 counting only the distinct ones).

The product of its (nonzero) digits is 1543500, while the sum is 48.

The spelling of 16557377052 in words is "sixteen billion, five hundred fifty-seven million, three hundred seventy-seven thousand, fifty-two".