91168651960 has 32 divisors (see below), whose sum is σ = 217195907760. Its totient is φ = 34322315776.

The previous prime is 91168651883. The next prime is 91168651997. The reversal of 91168651960 is 6915686119.

It is a happy number.

It is a super-2 number, since 2×91168651960² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91168651898 and 91168651907.

It is a congruent number.

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, 67035094 + ... + 67036453.

Almost surely, 2^91168651960 is an apocalyptic number.

It is an amenable number.

91168651960 is an abundant number, since it is smaller than the sum of its proper divisors (126027255800).

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

91168651960 is a wasteful number, since it uses less digits than its factorization.

91168651960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134071575 (or 134071571 counting only the distinct ones).

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

The spelling of 91168651960 in words is "ninety-one billion, one hundred sixty-eight million, six hundred fifty-one thousand, nine hundred sixty".