2156450057515 has 32 divisors (see below), whose sum is σ = 2795834059200. Its totient is φ = 1587294019584.

The previous prime is 2156450057513. The next prime is 2156450057521. The reversal of 2156450057515 is 5157500546512.

It is not a de Polignac number, because 2156450057515 - 2¹ = 2156450057513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2156450057513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94990636 + ... + 95013334.

It is an arithmetic number, because the mean of its divisors is an integer number (87369814350).

Almost surely, 2^{2156450057515} is an apocalyptic number.

2156450057515 is a deficient number, since it is larger than the sum of its proper divisors (639384001685).

2156450057515 is a wasteful number, since it uses less digits than its factorization.

2156450057515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27391.

The product of its (nonzero) digits is 1050000, while the sum is 46.

The spelling of 2156450057515 in words is "two trillion, one hundred fifty-six billion, four hundred fifty million, fifty-seven thousand, five hundred fifteen".