646242001400 has 48 divisors (see below), whose sum is σ = 1503234943800. Its totient is φ = 258372535680.

The previous prime is 646242001397. The next prime is 646242001439. The reversal of 646242001400 is 4100242646.

It is a happy number.

646242001400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 359015 + ... + 1192214.

Almost surely, 2^646242001400 is an apocalyptic number.

It is an amenable number.

646242001400 is an abundant number, since it is smaller than the sum of its proper divisors (856992942400).

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

646242001400 is a wasteful number, since it uses less digits than its factorization.

646242001400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553328 (or 1553319 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The spelling of 646242001400 in words is "six hundred forty-six billion, two hundred forty-two million, one thousand, four hundred".