91643165354 has 16 divisors (see below), whose sum is σ = 151188726528. Its totient is φ = 41396912112.

The previous prime is 91643165311. The next prime is 91643165387. The reversal of 91643165354 is 45356134619.

It is a super-2 number, since 2×91643165354² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91643165299 and 91643165308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37495982 + ... + 37498425.

It is an arithmetic number, because the mean of its divisors is an integer number (9449295408).

Almost surely, 2^91643165354 is an apocalyptic number.

91643165354 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

91643165354 is a deficient number, since it is larger than the sum of its proper divisors (59545561174).

91643165354 is a wasteful number, since it uses less digits than its factorization.

91643165354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74994469.

The product of its digits is 1166400, while the sum is 47.

The spelling of 91643165354 in words is "ninety-one billion, six hundred forty-three million, one hundred sixty-five thousand, three hundred fifty-four".