16525638428 has 24 divisors (see below), whose sum is σ = 31153122000. Its totient is φ = 7625099520.

The previous prime is 16525638427. The next prime is 16525638469. The reversal of 16525638428 is 82483652561.

It is a super-2 number, since 2×16525638428² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16525638427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153323 + ... + 237821.

It is an arithmetic number, because the mean of its divisors is an integer number (1298046750).

Almost surely, 2^16525638428 is an apocalyptic number.

It is an amenable number.

16525638428 is a deficient number, since it is larger than the sum of its proper divisors (14627483572).

16525638428 is a wasteful number, since it uses less digits than its factorization.

16525638428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88277 (or 88275 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 50.

The spelling of 16525638428 in words is "sixteen billion, five hundred twenty-five million, six hundred thirty-eight thousand, four hundred twenty-eight".