11656620887 has 2 divisors, whose sum is σ = 11656620888. Its totient is φ = 11656620886.

The previous prime is 11656620851. The next prime is 11656620919. The reversal of 11656620887 is 78802665611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11656620887 - 2²⁴ = 11639843671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11656620817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5828310443 + 5828310444.

It is an arithmetic number, because the mean of its divisors is an integer number (5828310444).

Almost surely, 2^11656620887 is an apocalyptic number.

11656620887 is a deficient number, since it is larger than the sum of its proper divisors (1).

11656620887 is an equidigital number, since it uses as much as digits as its factorization.

11656620887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 11656620887 in words is "eleven billion, six hundred fifty-six million, six hundred twenty thousand, eight hundred eighty-seven".