420646923904 has 16 divisors (see below), whose sum is σ = 838007543970. Its totient is φ = 210323461888.

The previous prime is 420646923821. The next prime is 420646923913. The reversal of 420646923904 is 409329646024.

It can be written as a sum of positive squares in only one way, i.e., 272692840000 + 147954083904 = 522200^2 + 384648^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1643151919 + ... + 1643152174.

Almost surely, 2^420646923904 is an apocalyptic number.

It is an amenable number.

420646923904 is a deficient number, since it is larger than the sum of its proper divisors (417360620066).

420646923904 is an equidigital number, since it uses as much as digits as its factorization.

420646923904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286304107 (or 3286304095 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 49.

The spelling of 420646923904 in words is "four hundred twenty billion, six hundred forty-six million, nine hundred twenty-three thousand, nine hundred four".