91732370536 has 8 divisors (see below), whose sum is σ = 171998194770. Its totient is φ = 45866185264.

The previous prime is 91732370507. The next prime is 91732370591. The reversal of 91732370536 is 63507323719.

It can be written as a sum of positive squares in only one way, i.e., 47293200900 + 44439169636 = 217470^2 + 210806^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5733273151 + ... + 5733273166.

Almost surely, 2^91732370536 is an apocalyptic number.

It is an amenable number.

91732370536 is a deficient number, since it is larger than the sum of its proper divisors (80265824234).

91732370536 is a wasteful number, since it uses less digits than its factorization.

91732370536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11466546323 (or 11466546319 counting only the distinct ones).

The product of its (nonzero) digits is 714420, while the sum is 46.

The spelling of 91732370536 in words is "ninety-one billion, seven hundred thirty-two million, three hundred seventy thousand, five hundred thirty-six".