91143456965 has 32 divisors (see below), whose sum is σ = 124383624192. Its totient is φ = 63512640000.

The previous prime is 91143456949. The next prime is 91143457021. The reversal of 91143456965 is 56965434119.

It is not a de Polignac number, because 91143456965 - 2⁴ = 91143456949 is a prime.

It is a super-2 number, since 2×91143456965² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92432 + ... + 436841.

It is an arithmetic number, because the mean of its divisors is an integer number (3886988256).

Almost surely, 2^91143456965 is an apocalyptic number.

It is an amenable number.

91143456965 is a deficient number, since it is larger than the sum of its proper divisors (33240167227).

91143456965 is a wasteful number, since it uses less digits than its factorization.

91143456965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529421.

The product of its digits is 3499200, while the sum is 53.

The spelling of 91143456965 in words is "ninety-one billion, one hundred forty-three million, four hundred fifty-six thousand, nine hundred sixty-five".