641077056 has 84 divisors (see below), whose sum is σ = 1846002912. Its totient is φ = 212707584.

The previous prime is 641077033. The next prime is 641077061. The reversal of 641077056 is 650770146.

641077056 is a `hidden beast` number, since 641 + 0 + 7 + 7 + 0 + 5 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 641077056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128301 + ... + 133203.

Almost surely, 2^641077056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641077056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (923001456).

641077056 is an abundant number, since it is smaller than the sum of its proper divisors (1204925856).

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

641077056 is a wasteful number, since it uses less digits than its factorization.

641077056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5148 (or 5135 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 641077056 is about 25319.4995211201. The cubic root of 641077056 is about 862.2570314986.

The spelling of 641077056 in words is "six hundred forty-one million, seventy-seven thousand, fifty-six".