91836541512 has 24 divisors (see below), whose sum is σ = 248723966790. Its totient is φ = 30612180480.

The previous prime is 91836541471. The next prime is 91836541519. The reversal of 91836541512 is 21514563819.

It is a happy number.

91836541512 is a `hidden beast` number, since 9 + 1 + 83 + 6 + 54 + 1 + 512 = 666.

It can be written as a sum of positive squares in only one way, i.e., 90320685156 + 1515856356 = 300534^2 + 38934^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×91836541512² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91836541519) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 637753689 + ... + 637753832.

Almost surely, 2^91836541512 is an apocalyptic number.

It is an amenable number.

91836541512 is an abundant number, since it is smaller than the sum of its proper divisors (156887425278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91836541512 is a wasteful number, since it uses less digits than its factorization.

91836541512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275507533 (or 1275507526 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The spelling of 91836541512 in words is "ninety-one billion, eight hundred thirty-six million, five hundred forty-one thousand, five hundred twelve".