215795151638 has 32 divisors (see below), whose sum is σ = 357450492672. Its totient is φ = 96886116000.

The previous prime is 215795151587. The next prime is 215795151641. The reversal of 215795151638 is 836151597512.

215795151638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 215795151638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11222120 + ... + 11241332.

It is an arithmetic number, because the mean of its divisors is an integer number (11170327896).

Almost surely, 2^215795151638 is an apocalyptic number.

215795151638 is a deficient number, since it is larger than the sum of its proper divisors (141655341034).

215795151638 is a wasteful number, since it uses less digits than its factorization.

215795151638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25460.

The product of its digits is 2268000, while the sum is 53.

The spelling of 215795151638 in words is "two hundred fifteen billion, seven hundred ninety-five million, one hundred fifty-one thousand, six hundred thirty-eight".