91681303064091 has 48 divisors (see below), whose sum is σ = 134359780593024. Its totient is φ = 55570622545152.

The previous prime is 91681303064041. The next prime is 91681303064137. The reversal of 91681303064091 is 19046030318619.

It is not a de Polignac number, because 91681303064091 - 2¹³ = 91681303055899 is a prime.

It is a super-2 number, since 2×91681303064091² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91681303064041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 295613095 + ... + 295923071.

It is an arithmetic number, because the mean of its divisors is an integer number (2799162095688).

Almost surely, 2^{91681303064091} is an apocalyptic number.

91681303064091 is a deficient number, since it is larger than the sum of its proper divisors (42678477528933).

91681303064091 is a wasteful number, since it uses less digits than its factorization.

91681303064091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318780 (or 318767 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 51.

The spelling of 91681303064091 in words is "ninety-one trillion, six hundred eighty-one billion, three hundred three million, sixty-four thousand, ninety-one".