2256156173577 has 8 divisors (see below), whose sum is σ = 3010516915264. Its totient is φ = 1502949773808.

The previous prime is 2256156173539. The next prime is 2256156173587. The reversal of 2256156173577 is 7753716516522.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2256156173577 - 2¹⁴ = 2256156157193 is a prime.

It is a super-2 number, since 2×2256156173577² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2256156173587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288580918 + ... + 288588735.

It is an arithmetic number, because the mean of its divisors is an integer number (376314614408).

Almost surely, 2^{2256156173577} is an apocalyptic number.

It is an amenable number.

2256156173577 is a deficient number, since it is larger than the sum of its proper divisors (754360741687).

2256156173577 is a wasteful number, since it uses less digits than its factorization.

2256156173577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577170959.

The product of its digits is 18522000, while the sum is 57.

The spelling of 2256156173577 in words is "two trillion, two hundred fifty-six billion, one hundred fifty-six million, one hundred seventy-three thousand, five hundred seventy-seven".