2656531187 has 2 divisors, whose sum is σ = 2656531188. Its totient is φ = 2656531186.

The previous prime is 2656531169. The next prime is 2656531253. The reversal of 2656531187 is 7811356562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2656531187 - 2⁶ = 2656531123 is a prime.

It is not a weakly prime, because it can be changed into another prime (2656531147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328265593 + 1328265594.

It is an arithmetic number, because the mean of its divisors is an integer number (1328265594).

Almost surely, 2^2656531187 is an apocalyptic number.

2656531187 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656531187 is an equidigital number, since it uses as much as digits as its factorization.

2656531187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 44.

The square root of 2656531187 is about 51541.5481626231. The cubic root of 2656531187 is about 1384.9634308529.

The spelling of 2656531187 in words is "two billion, six hundred fifty-six million, five hundred thirty-one thousand, one hundred eighty-seven".