91662536064 has 128 divisors (see below), whose sum is σ = 265967856000. Its totient is φ = 27739422720.

The previous prime is 91662536029. The next prime is 91662536071. The reversal of 91662536064 is 46063526619.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×91662536064² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

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, 3234147 + ... + 3262365.

It is an arithmetic number, because the mean of its divisors is an integer number (2077873875).

Almost surely, 2^91662536064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91662536064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132983928000).

91662536064 is an abundant number, since it is smaller than the sum of its proper divisors (174305319936).

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

91662536064 is a wasteful number, since it uses less digits than its factorization.

91662536064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29016 (or 29004 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 48.

It can be divided in two parts, 91662 and 536064, that added together give a palindrome (627726).

The spelling of 91662536064 in words is "ninety-one billion, six hundred sixty-two million, five hundred thirty-six thousand, sixty-four".