641306960 has 40 divisors (see below), whose sum is σ = 1704045696. Its totient is φ = 219876480.

The previous prime is 641306959. The next prime is 641306983. The reversal of 641306960 is 69603146.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×641306960² = 822549233888883200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 641306960.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 572036 + ... + 573155.

Almost surely, 2^641306960 is an apocalyptic number.

It is an amenable number.

641306960 is an abundant number, since it is smaller than the sum of its proper divisors (1062738736).

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

641306960 is a wasteful number, since it uses less digits than its factorization.

641306960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145211 (or 1145205 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 641306960 is about 25324.0391722963. The cubic root of 641306960 is about 862.3600938092.

The spelling of 641306960 in words is "six hundred forty-one million, three hundred six thousand, nine hundred sixty".