91861096516 has 12 divisors (see below), whose sum is σ = 183722193088. Its totient is φ = 39369041352.

The previous prime is 91861096501. The next prime is 91861096529. The reversal of 91861096516 is 61569016819.

It is a happy number.

91861096516 is an admirable number.

It is a super-2 number, since 2×91861096516² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1640376696 + ... + 1640376751.

Almost surely, 2^91861096516 is an apocalyptic number.

It is an amenable number.

91861096516 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

91861096516 is a wasteful number, since it uses less digits than its factorization.

91861096516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3280753458 (or 3280753456 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 52.

The spelling of 91861096516 in words is "ninety-one billion, eight hundred sixty-one million, ninety-six thousand, five hundred sixteen".