91412073081 has 48 divisors (see below), whose sum is σ = 156997255168. Its totient is φ = 50152284000.

The previous prime is 91412073059. The next prime is 91412073113. The reversal of 91412073081 is 18037021419.

It is a happy number.

91412073081 is a `hidden beast` number, since 9 + 141 + 207 + 308 + 1 = 666.

It is not a de Polignac number, because 91412073081 - 2¹⁷ = 91411942009 is a prime.

It is a super-2 number, since 2×91412073081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91412073001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63756 + ... + 432306.

Almost surely, 2^91412073081 is an apocalyptic number.

It is an amenable number.

91412073081 is a deficient number, since it is larger than the sum of its proper divisors (65585182087).

91412073081 is a wasteful number, since it uses less digits than its factorization.

91412073081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368722 (or 368719 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 91412073081 in words is "ninety-one billion, four hundred twelve million, seventy-three thousand, eighty-one".