91785235625 has 80 divisors (see below), whose sum is σ = 125442345600. Its totient is φ = 66870720000.

The previous prime is 91785235601. The next prime is 91785235651. The reversal of 91785235625 is 52653258719.

It is not a de Polignac number, because 91785235625 - 2¹⁰ = 91785234601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 107100197 + ... + 107101053.

It is an arithmetic number, because the mean of its divisors is an integer number (1568029320).

Almost surely, 2^91785235625 is an apocalyptic number.

91785235625 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

91785235625 is a deficient number, since it is larger than the sum of its proper divisors (33657109975).

91785235625 is a wasteful number, since it uses less digits than its factorization.

91785235625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236 (or 1221 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 53.

The spelling of 91785235625 in words is "ninety-one billion, seven hundred eighty-five million, two hundred thirty-five thousand, six hundred twenty-five".