91363978365 has 16 divisors (see below), whose sum is σ = 159471671616. Its totient is φ = 44297686400.

The previous prime is 91363978337. The next prime is 91363978367. The reversal of 91363978365 is 56387936319.

It is not a de Polignac number, because 91363978365 - 2¹⁸ = 91363716221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91363978299 and 91363978308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91363978367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276860376 + ... + 276860705.

It is an arithmetic number, because the mean of its divisors is an integer number (9966979476).

Almost surely, 2^91363978365 is an apocalyptic number.

It is an amenable number.

91363978365 is a deficient number, since it is larger than the sum of its proper divisors (68107693251).

91363978365 is a wasteful number, since it uses less digits than its factorization.

91363978365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553721100.

The product of its digits is 22044960, while the sum is 60.

The spelling of 91363978365 in words is "ninety-one billion, three hundred sixty-three million, nine hundred seventy-eight thousand, three hundred sixty-five".