16297977564 has 72 divisors (see below), whose sum is σ = 45296928768. Its totient is φ = 4899877920.

The previous prime is 16297977511. The next prime is 16297977569. The reversal of 16297977564 is 46577979261.

16297977564 is a `hidden beast` number, since 1 + 62 + 9 + 7 + 9 + 7 + 7 + 564 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16297977569) 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, 111742 + ... + 212325.

Almost surely, 2^16297977564 is an apocalyptic number.

It is an amenable number.

16297977564 is an abundant number, since it is smaller than the sum of its proper divisors (28998951204).

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

16297977564 is a wasteful number, since it uses less digits than its factorization.

16297977564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324215 (or 324210 counting only the distinct ones).

The product of its digits is 40007520, while the sum is 63.

It can be divided in two parts, 1629797 and 7564, that added together give a palindrome (1637361).

The spelling of 16297977564 in words is "sixteen billion, two hundred ninety-seven million, nine hundred seventy-seven thousand, five hundred sixty-four".