10656214991 has 2 divisors, whose sum is σ = 10656214992. Its totient is φ = 10656214990.

The previous prime is 10656214973. The next prime is 10656215149. The reversal of 10656214991 is 19941265601.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10656214991 is a prime.

It is a super-2 number, since 2×10656214991² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10656214901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5328107495 + 5328107496.

It is an arithmetic number, because the mean of its divisors is an integer number (5328107496).

Almost surely, 2^10656214991 is an apocalyptic number.

10656214991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10656214991 is an equidigital number, since it uses as much as digits as its factorization.

10656214991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 10656214991 in words is "ten billion, six hundred fifty-six million, two hundred fourteen thousand, nine hundred ninety-one".