402166522400 has 36 divisors (see below), whose sum is σ = 981789024762. Its totient is φ = 160866608640.

The previous prime is 402166522399. The next prime is 402166522447. The reversal of 402166522400 is 4225661204.

It can be written as a sum of positive squares in 3 ways, for example, as 217861163536 + 184305358864 = 466756^2 + 429308^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 251353277 + ... + 251354876.

Almost surely, 2^402166522400 is an apocalyptic number.

402166522400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402166522400 is an abundant number, since it is smaller than the sum of its proper divisors (579622502362).

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

402166522400 is a wasteful number, since it uses less digits than its factorization.

402166522400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502708173 (or 502708160 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 402166522400 in words is "four hundred two billion, one hundred sixty-six million, five hundred twenty-two thousand, four hundred".