641654532 has 36 divisors (see below), whose sum is σ = 1623323520. Its totient is φ = 213705072.

The previous prime is 641654467. The next prime is 641654537. The reversal of 641654532 is 235456146.

641654532 is a `hidden beast` number, since 64 + 1 + 65 + 4 + 532 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×641654532² = 823441076872278048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (641654537) 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, 40069 + ... + 53747.

It is an arithmetic number, because the mean of its divisors is an integer number (45092320).

Almost surely, 2^641654532 is an apocalyptic number.

It is an amenable number.

641654532 is an abundant number, since it is smaller than the sum of its proper divisors (981668988).

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

641654532 is a wasteful number, since it uses less digits than its factorization.

641654532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14992 (or 14987 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 641654532 is about 25330.9007340837. The cubic root of 641654532 is about 862.5158580575.

The spelling of 641654532 in words is "six hundred forty-one million, six hundred fifty-four thousand, five hundred thirty-two".