402002217864 has 80 divisors (see below), whose sum is σ = 1212592185420. Its totient is φ = 123692987520.

The previous prime is 402002217857. The next prime is 402002217907. The reversal of 402002217864 is 468712200204.

402002217864 is a `hidden beast` number, since 402 + 0 + 0 + 22 + 178 + 64 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 333457741764 + 68544476100 = 577458^2 + 261810^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23852107 + ... + 23868954.

Almost surely, 2^402002217864 is an apocalyptic number.

It is an amenable number.

402002217864 is an abundant number, since it is smaller than the sum of its proper divisors (810589967556).

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

402002217864 is a wasteful number, since it uses less digits than its factorization.

402002217864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47721092 (or 47721079 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The spelling of 402002217864 in words is "four hundred two billion, two million, two hundred seventeen thousand, eight hundred sixty-four".