91512463077505 has 16 divisors (see below), whose sum is σ = 110846969853840. Its totient is φ = 72522258446592.

The previous prime is 91512463077481. The next prime is 91512463077517. The reversal of 91512463077505 is 50577036421519.

It can be written as a sum of positive squares in 8 ways, for example, as 31786908688144 + 59725554389361 = 5637988^2 + 7728231^2 .

It is a cyclic number.

It is not a de Polignac number, because 91512463077505 - 2⁴¹ = 89313439821953 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16124994 + ... + 21048523.

It is an arithmetic number, because the mean of its divisors is an integer number (6927935615865).

Almost surely, 2^{91512463077505} is an apocalyptic number.

It is an amenable number.

91512463077505 is a deficient number, since it is larger than the sum of its proper divisors (19334506776335).

91512463077505 is a wasteful number, since it uses less digits than its factorization.

91512463077505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37178148.

The product of its (nonzero) digits is 7938000, while the sum is 55.

The spelling of 91512463077505 in words is "ninety-one trillion, five hundred twelve billion, four hundred sixty-three million, seventy-seven thousand, five hundred five".