91679868945654 has 32 divisors (see below), whose sum is σ = 204284736999936. Its totient is φ = 27190676797920.

The previous prime is 91679868945631. The next prime is 91679868945671. The reversal of 91679868945654 is 45654986897619.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14777538637 + ... + 14777544840.

It is an arithmetic number, because the mean of its divisors is an integer number (6383898031248).

Almost surely, 2^{91679868945654} is an apocalyptic number.

91679868945654 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

91679868945654 is an abundant number, since it is smaller than the sum of its proper divisors (112604868054282).

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

91679868945654 is a wasteful number, since it uses less digits than its factorization.

91679868945654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29555083540.

The product of its digits is 28217548800, while the sum is 87.

The spelling of 91679868945654 in words is "ninety-one trillion, six hundred seventy-nine billion, eight hundred sixty-eight million, nine hundred forty-five thousand, six hundred fifty-four".