213188916738 has 64 divisors (see below), whose sum is σ = 543108464640. Its totient is φ = 54310839552.

The previous prime is 213188916713. The next prime is 213188916817. The reversal of 213188916738 is 837619881312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7843906 + ... + 7871037.

It is an arithmetic number, because the mean of its divisors is an integer number (8486069760).

Almost surely, 2^213188916738 is an apocalyptic number.

213188916738 is an abundant number, since it is smaller than the sum of its proper divisors (329919547902).

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

213188916738 is a wasteful number, since it uses less digits than its factorization.

213188916738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15714991.

The product of its digits is 3483648, while the sum is 57.

The spelling of 213188916738 in words is "two hundred thirteen billion, one hundred eighty-eight million, nine hundred sixteen thousand, seven hundred thirty-eight".