10891716637 has 2 divisors, whose sum is σ = 10891716638. Its totient is φ = 10891716636.

The previous prime is 10891716629. The next prime is 10891716643. The reversal of 10891716637 is 73661719801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6422259321 + 4469457316 = 80139^2 + 66854^2 .

It is a cyclic number.

It is not a de Polignac number, because 10891716637 - 2³ = 10891716629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10891716037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5445858318 + 5445858319.

It is an arithmetic number, because the mean of its divisors is an integer number (5445858319).

Almost surely, 2^10891716637 is an apocalyptic number.

It is an amenable number.

10891716637 is a deficient number, since it is larger than the sum of its proper divisors (1).

10891716637 is an equidigital number, since it uses as much as digits as its factorization.

10891716637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 49.

The spelling of 10891716637 in words is "ten billion, eight hundred ninety-one million, seven hundred sixteen thousand, six hundred thirty-seven".