2156744777513 has 16 divisors (see below), whose sum is σ = 2323273529280. Its totient is φ = 1995526580544.

The previous prime is 2156744777477. The next prime is 2156744777521. The reversal of 2156744777513 is 3157774476512.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2156744777513 - 2²² = 2156740583209 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2156744777533) by changing a digit.

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, 8943995 + ... + 9181967.

It is an arithmetic number, because the mean of its divisors is an integer number (145204595580).

Almost surely, 2^{2156744777513} is an apocalyptic number.

It is an amenable number.

2156744777513 is a deficient number, since it is larger than the sum of its proper divisors (166528751767).

2156744777513 is a wasteful number, since it uses less digits than its factorization.

2156744777513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249128.

The product of its digits is 34574400, while the sum is 59.

The spelling of 2156744777513 in words is "two trillion, one hundred fifty-six billion, seven hundred forty-four million, seven hundred seventy-seven thousand, five hundred thirteen".