641057772 has 18 divisors (see below), whose sum is σ = 1496006148. Its totient is φ = 213656688.

The previous prime is 641057741. The next prime is 641057783. The reversal of 641057772 is 277750146.

It is a self number, because there is not a number n which added to its sum of digits gives 641057772.

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, 84054 + ... + 91362.

Almost surely, 2^641057772 is an apocalyptic number.

It is an amenable number.

641057772 is an abundant number, since it is smaller than the sum of its proper divisors (854948376).

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

641057772 is an frugal number, since it uses more digits than its factorization.

641057772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14625 (or 7314 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 39.

The square root of 641057772 is about 25319.1187050418. The cubic root of 641057772 is about 862.2483856677.

The spelling of 641057772 in words is "six hundred forty-one million, fifty-seven thousand, seven hundred seventy-two".