65645402532 has 48 divisors (see below), whose sum is σ = 153455807232. Its totient is φ = 21841388800.

The previous prime is 65645402527. The next prime is 65645402569. The reversal of 65645402532 is 23520454656.

It is a super-2 number, since 2×65645402532² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27921157 + ... + 27923507.

It is an arithmetic number, because the mean of its divisors is an integer number (3196995984).

Almost surely, 2^65645402532 is an apocalyptic number.

It is an amenable number.

65645402532 is an abundant number, since it is smaller than the sum of its proper divisors (87810404700).

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

65645402532 is a wasteful number, since it uses less digits than its factorization.

65645402532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5668 (or 5666 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 42.

The spelling of 65645402532 in words is "sixty-five billion, six hundred forty-five million, four hundred two thousand, five hundred thirty-two".