2157161786315 has 32 divisors (see below), whose sum is σ = 2634460899840. Its totient is φ = 1695497440000.

The previous prime is 2157161786303. The next prime is 2157161786323. The reversal of 2157161786315 is 5136871617512.

It is a happy number.

It is not a de Polignac number, because 2157161786315 - 2⁶ = 2157161786251 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 31 ways as a sum of consecutive naturals, for example, 27416351 + ... + 27494919.

It is an arithmetic number, because the mean of its divisors is an integer number (82326903120).

Almost surely, 2^{2157161786315} is an apocalyptic number.

2157161786315 is a deficient number, since it is larger than the sum of its proper divisors (477299113525).

2157161786315 is a wasteful number, since it uses less digits than its factorization.

2157161786315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79123.

The product of its digits is 2116800, while the sum is 53.

The spelling of 2157161786315 in words is "two trillion, one hundred fifty-seven billion, one hundred sixty-one million, seven hundred eighty-six thousand, three hundred fifteen".