91524216200561 has 2 divisors, whose sum is σ = 91524216200562. Its totient is φ = 91524216200560.

The previous prime is 91524216200533. The next prime is 91524216200587. The reversal of 91524216200561 is 16500261242519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72967557831025 + 18556658369536 = 8542105^2 + 4307744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91524216200561 is a prime.

It is a super-2 number, since 2×91524216200561² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91524216200531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45762108100280 + 45762108100281.

It is an arithmetic number, because the mean of its divisors is an integer number (45762108100281).

Almost surely, 2^{91524216200561} is an apocalyptic number.

It is an amenable number.

91524216200561 is a deficient number, since it is larger than the sum of its proper divisors (1).

91524216200561 is an equidigital number, since it uses as much as digits as its factorization.

91524216200561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 91524216200561 in words is "ninety-one trillion, five hundred twenty-four billion, two hundred sixteen million, two hundred thousand, five hundred sixty-one".