65656542532 has 192 divisors, whose sum is σ = 145291345920. Its totient is φ = 25345926144.

The previous prime is 65656542527. The next prime is 65656542547. The reversal of 65656542532 is 23524565656.

Its product of digits (6480000) is a multiple of the sum of its prime divisors (648).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 171426813 + ... + 171427195.

It is an arithmetic number, because the mean of its divisors is an integer number (756725760).

Almost surely, 2^65656542532 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65656542532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72645672960).

65656542532 is an abundant number, since it is smaller than the sum of its proper divisors (79634803388).

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

65656542532 is a wasteful number, since it uses less digits than its factorization.

65656542532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 648 counting only the distinct ones).

The product of its digits is 6480000, while the sum is 49.

The spelling of 65656542532 in words is "sixty-five billion, six hundred fifty-six million, five hundred forty-two thousand, five hundred thirty-two".