2158637666715 has 12 divisors (see below), whose sum is σ = 3741638622384. Its totient is φ = 1151273422224.

The previous prime is 2158637666693. The next prime is 2158637666761. The reversal of 2158637666715 is 5176667368512.

It is not a de Polignac number, because 2158637666715 - 2¹² = 2158637662619 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23984862919 + ... + 23984863008.

It is an arithmetic number, because the mean of its divisors is an integer number (311803218532).

Almost surely, 2^{2158637666715} is an apocalyptic number.

2158637666715 is a deficient number, since it is larger than the sum of its proper divisors (1583000955669).

2158637666715 is a wasteful number, since it uses less digits than its factorization.

2158637666715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47969725938 (or 47969725935 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 63.

The spelling of 2158637666715 in words is "two trillion, one hundred fifty-eight billion, six hundred thirty-seven million, six hundred sixty-six thousand, seven hundred fifteen".