641201056 has 24 divisors (see below), whose sum is σ = 1328806080. Its totient is φ = 303726528.

The previous prime is 641201047. The next prime is 641201063. The reversal of 641201056 is 650102146.

It is a super-2 number, since 2×641201056² = 822277588431030272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641201056.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526696 + ... + 527911.

It is an arithmetic number, because the mean of its divisors is an integer number (55366920).

Almost surely, 2^641201056 is an apocalyptic number.

It is an amenable number.

641201056 is an abundant number, since it is smaller than the sum of its proper divisors (687605024).

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

641201056 is a wasteful number, since it uses less digits than its factorization.

641201056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054636 (or 1054628 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 641201056 is about 25321.9481083111. The cubic root of 641201056 is about 862.3126217889.

The spelling of 641201056 in words is "six hundred forty-one million, two hundred one thousand, fifty-six".