641407770 has 48 divisors (see below), whose sum is σ = 1669704192. Its totient is φ = 170832480.

The previous prime is 641407721. The next prime is 641407783. The reversal of 641407770 is 77704146.

641407770 is a `hidden beast` number, since 641 + 4 + 0 + 7 + 7 + 7 + 0 = 666.

641407770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×641407770² = 822807854832745800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78079 + ... + 85901.

It is an arithmetic number, because the mean of its divisors is an integer number (34785504).

Almost surely, 2^641407770 is an apocalyptic number.

641407770 is an abundant number, since it is smaller than the sum of its proper divisors (1028296422).

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

641407770 is a wasteful number, since it uses less digits than its factorization.

641407770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8747 (or 8744 counting only the distinct ones).

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

The square root of 641407770 is about 25326.0294953631. The cubic root of 641407770 is about 862.4052775624.

The spelling of 641407770 in words is "six hundred forty-one million, four hundred seven thousand, seven hundred seventy".