2156719792545 has 32 divisors (see below), whose sum is σ = 3899154441600. Its totient is φ = 1130754779712.

The previous prime is 2156719792537. The next prime is 2156719792561. The reversal of 2156719792545 is 5452979176512.

It is a happy number.

2156719792545 is a `hidden beast` number, since 2 + 1 + 5 + 6 + 7 + 19 + 79 + 2 + 545 = 666.

It is not a de Polignac number, because 2156719792545 - 2³ = 2156719792537 is a prime.

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, 135379342 + ... + 135395271.

It is an arithmetic number, because the mean of its divisors is an integer number (121848576300).

Almost surely, 2^{2156719792545} is an apocalyptic number.

It is an amenable number.

2156719792545 is a deficient number, since it is larger than the sum of its proper divisors (1742434649055).

2156719792545 is a wasteful number, since it uses less digits than its factorization.

2156719792545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270774686 (or 270774680 counting only the distinct ones).

The product of its digits is 47628000, while the sum is 63.

The spelling of 2156719792545 in words is "two trillion, one hundred fifty-six billion, seven hundred nineteen million, seven hundred ninety-two thousand, five hundred forty-five".