641954852 has 36 divisors (see below), whose sum is σ = 1411247040. Its totient is φ = 250110960.

The previous prime is 641954849. The next prime is 641954861. The reversal of 641954852 is 258459146.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91352 + ... + 98127.

Almost surely, 2^641954852 is an apocalyptic number.

It is an amenable number.

641954852 is an abundant number, since it is smaller than the sum of its proper divisors (769292188).

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

641954852 is a wasteful number, since it uses less digits than its factorization.

641954852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189512 (or 189499 counting only the distinct ones).

The product of its digits is 345600, while the sum is 44.

The square root of 641954852 is about 25336.8279782612. The cubic root of 641954852 is about 862.6504010490.

The spelling of 641954852 in words is "six hundred forty-one million, nine hundred fifty-four thousand, eight hundred fifty-two".