32491725138 has 24 divisors (see below), whose sum is σ = 70404062976. Its totient is φ = 10829755800.

The previous prime is 32491725127. The next prime is 32491725139. The reversal of 32491725138 is 83152719423.

It is a happy number.

32491725138 is a `hidden beast` number, since 3 + 2 + 491 + 7 + 25 + 138 = 666.

It is a super-2 number, since 2×32491725138² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 32491725093 and 32491725102.

It is not an unprimeable number, because it can be changed into a prime (32491725139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206103 + ... + 327813.

It is an arithmetic number, because the mean of its divisors is an integer number (2933502624).

Almost surely, 2^32491725138 is an apocalyptic number.

32491725138 is an abundant number, since it is smaller than the sum of its proper divisors (37912337838).

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

32491725138 is a wasteful number, since it uses less digits than its factorization.

32491725138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136550 (or 136547 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 32491725138 in words is "thirty-two billion, four hundred ninety-one million, seven hundred twenty-five thousand, one hundred thirty-eight".