91863720192 has 36 divisors (see below), whose sum is σ = 244491465680. Its totient is φ = 30621239808.

The previous prime is 91863720191. The next prime is 91863720197. The reversal of 91863720192 is 29102736819.

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

It is not an unprimeable number, because it can be changed into a prime (91863720191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59806342 + ... + 59807877.

Almost surely, 2^91863720192 is an apocalyptic number.

It is an amenable number.

91863720192 is an abundant number, since it is smaller than the sum of its proper divisors (152627745488).

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

91863720192 is a wasteful number, since it uses less digits than its factorization.

91863720192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119614238 (or 119614224 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The spelling of 91863720192 in words is "ninety-one billion, eight hundred sixty-three million, seven hundred twenty thousand, one hundred ninety-two".