641614968 has 24 divisors (see below), whose sum is σ = 1737707400. Its totient is φ = 213871632.

The previous prime is 641614951. The next prime is 641614991. The reversal of 641614968 is 869416146.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4455588 + ... + 4455731.

It is an arithmetic number, because the mean of its divisors is an integer number (72404475).

Almost surely, 2^641614968 is an apocalyptic number.

It is an amenable number.

641614968 is an abundant number, since it is smaller than the sum of its proper divisors (1096092432).

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

641614968 is a wasteful number, since it uses less digits than its factorization.

641614968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8911331 (or 8911324 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 641614968 is about 25330.1197786351. The cubic root of 641614968 is about 862.4981303047.

The spelling of 641614968 in words is "six hundred forty-one million, six hundred fourteen thousand, nine hundred sixty-eight".