16402018806 has 16 divisors (see below), whose sum is σ = 36448930800. Its totient is φ = 5467339584.

The previous prime is 16402018777. The next prime is 16402018861. The reversal of 16402018806 is 60881020461.

16402018806 is a `hidden beast` number, since 1 + 640 + 2 + 0 + 1 + 8 + 8 + 0 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151870491 + ... + 151870598.

It is an arithmetic number, because the mean of its divisors is an integer number (2278058175).

Almost surely, 2^16402018806 is an apocalyptic number.

16402018806 is an abundant number, since it is smaller than the sum of its proper divisors (20046911994).

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

16402018806 is a wasteful number, since it uses less digits than its factorization.

16402018806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303741100 (or 303741094 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The spelling of 16402018806 in words is "sixteen billion, four hundred two million, eighteen thousand, eight hundred six".