646620272470 has 32 divisors (see below), whose sum is σ = 1219561168320. Its totient is φ = 246375951360.

The previous prime is 646620272357. The next prime is 646620272483. The reversal of 646620272470 is 74272026646.

646620272470 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 646620272470.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5777335 + ... + 5888194.

It is an arithmetic number, because the mean of its divisors is an integer number (38111286510).

Almost surely, 2^646620272470 is an apocalyptic number.

646620272470 is a deficient number, since it is larger than the sum of its proper divisors (572940895850).

646620272470 is a wasteful number, since it uses less digits than its factorization.

646620272470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11665800.

The product of its (nonzero) digits is 1354752, while the sum is 46.

The spelling of 646620272470 in words is "six hundred forty-six billion, six hundred twenty million, two hundred seventy-two thousand, four hundred seventy".