91582964131 has 4 divisors (see below), whose sum is σ = 91699334632. Its totient is φ = 91466593632.

The previous prime is 91582964129. The next prime is 91582964147. The reversal of 91582964131 is 13146928519.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91582964131 - 2¹ = 91582964129 is a prime.

It is a super-2 number, since 2×91582964131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91582964531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58184070 + ... + 58185643.

It is an arithmetic number, because the mean of its divisors is an integer number (22924833658).

Almost surely, 2^91582964131 is an apocalyptic number.

91582964131 is a deficient number, since it is larger than the sum of its proper divisors (116370501).

91582964131 is a wasteful number, since it uses less digits than its factorization.

91582964131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116370500.

The product of its digits is 466560, while the sum is 49.

The spelling of 91582964131 in words is "ninety-one billion, five hundred eighty-two million, nine hundred sixty-four thousand, one hundred thirty-one".