91693508436 has 24 divisors (see below), whose sum is σ = 237723911040. Its totient is φ = 30564502776.

The previous prime is 91693508429. The next prime is 91693508437. The reversal of 91693508436 is 63480539619.

91693508436 is a `hidden beast` number, since 9 + 1 + 6 + 93 + 508 + 43 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91693508437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424506876 + ... + 424507091.

It is an arithmetic number, because the mean of its divisors is an integer number (9905162960).

Almost surely, 2^91693508436 is an apocalyptic number.

It is an amenable number.

91693508436 is an abundant number, since it is smaller than the sum of its proper divisors (146030402604).

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

91693508436 is a wasteful number, since it uses less digits than its factorization.

91693508436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849013980 (or 849013972 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 91693508436 in words is "ninety-one billion, six hundred ninety-three million, five hundred eight thousand, four hundred thirty-six".