91974554063 has 16 divisors (see below), whose sum is σ = 109859426880. Its totient is φ = 75332146176.

The previous prime is 91974554047. The next prime is 91974554143. The reversal of 91974554063 is 36045547919.

It is not a de Polignac number, because 91974554063 - 2⁴ = 91974554047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91974553996 and 91974554014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91974554863) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 2315756 + ... + 2355137.

It is an arithmetic number, because the mean of its divisors is an integer number (6866214180).

Almost surely, 2^91974554063 is an apocalyptic number.

91974554063 is a deficient number, since it is larger than the sum of its proper divisors (17884872817).

91974554063 is a wasteful number, since it uses less digits than its factorization.

91974554063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671026.

The product of its (nonzero) digits is 4082400, while the sum is 53.

The spelling of 91974554063 in words is "ninety-one billion, nine hundred seventy-four million, five hundred fifty-four thousand, sixty-three".