91525630961 has 2 divisors, whose sum is σ = 91525630962. Its totient is φ = 91525630960.

The previous prime is 91525630927. The next prime is 91525630967. The reversal of 91525630961 is 16903652519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85581991936 + 5943639025 = 292544^2 + 77095^2 .

It is a cyclic number.

It is not a de Polignac number, because 91525630961 - 2¹⁸ = 91525368817 is a prime.

It is a super-2 number, since 2×91525630961² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (91525630967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45762815480 + 45762815481.

It is an arithmetic number, because the mean of its divisors is an integer number (45762815481).

Almost surely, 2^91525630961 is an apocalyptic number.

It is an amenable number.

91525630961 is a deficient number, since it is larger than the sum of its proper divisors (1).

91525630961 is an equidigital number, since it uses as much as digits as its factorization.

91525630961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 437400, while the sum is 47.

The spelling of 91525630961 in words is "ninety-one billion, five hundred twenty-five million, six hundred thirty thousand, nine hundred sixty-one".