97959833581 has 4 divisors (see below), whose sum is σ = 98008840000. Its totient is φ = 97910827164.

The previous prime is 97959833563. The next prime is 97959833603. The reversal of 97959833581 is 18533895979.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 97959833581 - 2²⁵ = 97926279149 is a prime.

It is a super-2 number, since 2×97959833581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97959833501) 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, 24500211 + ... + 24504208.

It is an arithmetic number, because the mean of its divisors is an integer number (24502210000).

Almost surely, 2^97959833581 is an apocalyptic number.

It is an amenable number.

97959833581 is a deficient number, since it is larger than the sum of its proper divisors (49006419).

97959833581 is a wasteful number, since it uses less digits than its factorization.

97959833581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49006418.

The product of its digits is 73483200, while the sum is 67.

The spelling of 97959833581 in words is "ninety-seven billion, nine hundred fifty-nine million, eight hundred thirty-three thousand, five hundred eighty-one".