91634653494 has 48 divisors (see below), whose sum is σ = 199763770752. Its totient is φ = 30357014784.

The previous prime is 91634653493. The next prime is 91634653511. The reversal of 91634653494 is 49435643619.

It is a happy number.

91634653494 is a `hidden beast` number, since 9 + 1 + 63 + 46 + 53 + 494 = 666.

It is a super-3 number, since 3×91634653494³ (a number of 34 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91634653494.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91634653493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14642014 + ... + 14648270.

It is an arithmetic number, because the mean of its divisors is an integer number (4161745224).

Almost surely, 2^91634653494 is an apocalyptic number.

91634653494 is an abundant number, since it is smaller than the sum of its proper divisors (108129117258).

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

91634653494 is a wasteful number, since it uses less digits than its factorization.

91634653494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11141 (or 11138 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 54.

The spelling of 91634653494 in words is "ninety-one billion, six hundred thirty-four million, six hundred fifty-three thousand, four hundred ninety-four".