2256578137 has 8 divisors (see below), whose sum is σ = 2472474240. Its totient is φ = 2042474160.

The previous prime is 2256578119. The next prime is 2256578173. The reversal of 2256578137 is 7318756522.

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

It is a cyclic number.

It is not a de Polignac number, because 2256578137 - 2¹¹ = 2256576089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2256578437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445393 + ... + 450430.

It is an arithmetic number, because the mean of its divisors is an integer number (309059280).

Almost surely, 2^2256578137 is an apocalyptic number.

It is an amenable number.

2256578137 is a deficient number, since it is larger than the sum of its proper divisors (215896103).

2256578137 is a wasteful number, since it uses less digits than its factorization.

2256578137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896063.

The product of its digits is 705600, while the sum is 46.

The square root of 2256578137 is about 47503.4539481078. The cubic root of 2256578137 is about 1311.6464617350.

The spelling of 2256578137 in words is "two billion, two hundred fifty-six million, five hundred seventy-eight thousand, one hundred thirty-seven".