641072772 has 24 divisors (see below), whose sum is σ = 1662040800. Its totient is φ = 213690888.

The previous prime is 641072713. The next prime is 641072791. The reversal of 641072772 is 277270146.

It is a happy number.

641072772 is a `hidden beast` number, since 641 + 0 + 7 + 2 + 7 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 2967822 + ... + 2968037.

It is an arithmetic number, because the mean of its divisors is an integer number (69251700).

Almost surely, 2^641072772 is an apocalyptic number.

It is an amenable number.

641072772 is an abundant number, since it is smaller than the sum of its proper divisors (1020968028).

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

641072772 is a wasteful number, since it uses less digits than its factorization.

641072772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5935872 (or 5935864 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 641072772 is about 25319.4149221502. The cubic root of 641072772 is about 862.2551108156.

The spelling of 641072772 in words is "six hundred forty-one million, seventy-two thousand, seven hundred seventy-two".