91512463077481 has 2 divisors, whose sum is σ = 91512463077482. Its totient is φ = 91512463077480.

The previous prime is 91512463077461. The next prime is 91512463077517. The reversal of 91512463077481 is 18477036421519.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67880857352256 + 23631605725225 = 8238984^2 + 4861235^2 .

It is a cyclic number.

It is not a de Polignac number, because 91512463077481 - 2⁵ = 91512463077449 is a prime.

It is a super-2 number, since 2×91512463077481² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91512463077401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45756231538740 + 45756231538741.

It is an arithmetic number, because the mean of its divisors is an integer number (45756231538741).

It is a 1-persistent number, because it is pandigital, but 2⋅91512463077481 = 183024926154962 is not.

Almost surely, 2^{91512463077481} is an apocalyptic number.

It is an amenable number.

91512463077481 is a deficient number, since it is larger than the sum of its proper divisors (1).

91512463077481 is an equidigital number, since it uses as much as digits as its factorization.

91512463077481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10160640, while the sum is 58.

The spelling of 91512463077481 in words is "ninety-one trillion, five hundred twelve billion, four hundred sixty-three million, seventy-seven thousand, four hundred eighty-one".