641958912 has 352 divisors, whose sum is σ = 2263818240. Its totient is φ = 175841280.

The previous prime is 641958841. The next prime is 641958923. The reversal of 641958912 is 219859146.

641958912 is a `hidden beast` number, since 64 + 1 + 9 + 589 + 1 + 2 = 666.

It is a super-2 number, since 2×641958912² = 824222489392447488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5999563 + ... + 5999669.

Almost surely, 2^641958912 is an apocalyptic number.

641958912 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641958912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1131909120).

641958912 is an abundant number, since it is smaller than the sum of its proper divisors (1621859328).

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

641958912 is a wasteful number, since it uses less digits than its factorization.

641958912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 150 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 641958912 is about 25336.9080986611. The cubic root of 641958912 is about 862.6522196365.

The spelling of 641958912 in words is "six hundred forty-one million, nine hundred fifty-eight thousand, nine hundred twelve".