16229720925 has 108 divisors (see below), whose sum is σ = 33137045760. Its totient is φ = 7868599200.

The previous prime is 16229720911. The next prime is 16229720929. The reversal of 16229720925 is 52902792261.

It is not a de Polignac number, because 16229720925 - 2⁶ = 16229720861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16229720929) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 724036 + ... + 746114.

Almost surely, 2^16229720925 is an apocalyptic number.

16229720925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16229720925 is an abundant number, since it is smaller than the sum of its proper divisors (16907324835).

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

16229720925 is a wasteful number, since it uses less digits than its factorization.

16229720925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22126 (or 22098 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 16229720925 in words is "sixteen billion, two hundred twenty-nine million, seven hundred twenty thousand, nine hundred twenty-five".