2256873722587 has 54 divisors (see below), whose sum is σ = 2589474788516. Its totient is φ = 1964442627840.

The previous prime is 2256873722581. The next prime is 2256873722611. The reversal of 2256873722587 is 7852273786522.

It is a happy number.

It is not a de Polignac number, because 2256873722587 - 2³¹ = 2254726238939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2256873722581) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 6393409803 + ... + 6393410155.

Almost surely, 2^{2256873722587} is an apocalyptic number.

2256873722587 is a deficient number, since it is larger than the sum of its proper divisors (332601065929).

2256873722587 is an frugal number, since it uses more digits than its factorization.

2256873722587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889 (or 466 counting only the distinct ones).

The product of its digits is 158054400, while the sum is 64.

The spelling of 2256873722587 in words is "two trillion, two hundred fifty-six billion, eight hundred seventy-three million, seven hundred twenty-two thousand, five hundred eighty-seven".