91957511545 has 16 divisors (see below), whose sum is σ = 116863388928. Its totient is φ = 69224815360.

The previous prime is 91957511539. The next prime is 91957511599. The reversal of 91957511545 is 54511575919.

It is not a de Polignac number, because 91957511545 - 2³ = 91957511537 is a prime.

It is a super-3 number, since 3×91957511545³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91957511492 and 91957511501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 332400 + ... + 542590.

It is an arithmetic number, because the mean of its divisors is an integer number (7303961808).

Almost surely, 2^91957511545 is an apocalyptic number.

It is an amenable number.

91957511545 is a deficient number, since it is larger than the sum of its proper divisors (24905877383).

91957511545 is a wasteful number, since it uses less digits than its factorization.

91957511545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215360.

The product of its digits is 1417500, while the sum is 52.

The spelling of 91957511545 in words is "ninety-one billion, nine hundred fifty-seven million, five hundred eleven thousand, five hundred forty-five".