831955597457 has 4 divisors (see below), whose sum is σ = 832019016996. Its totient is φ = 831892177920.

The previous prime is 831955597439. The next prime is 831955597507. The reversal of 831955597457 is 754795559138.

It is a Cunningham number, because it is equal to 912116²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 754795559138 = 2 ⋅377397779569.

It can be written as a sum of positive squares in 2 ways, for example, as 117404910736 + 714550686721 = 342644^2 + 845311^2 .

It is a cyclic number.

It is not a de Polignac number, because 831955597457 - 2¹⁸ = 831955335313 is a prime.

It is a super-2 number, since 2×831955597457² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (831955597427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31690088 + ... + 31716329.

It is an arithmetic number, because the mean of its divisors is an integer number (208004754249).

Almost surely, 2^831955597457 is an apocalyptic number.

It is an amenable number.

831955597457 is a deficient number, since it is larger than the sum of its proper divisors (63419539).

831955597457 is a wasteful number, since it uses less digits than its factorization.

831955597457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63419538.

The product of its digits is 238140000, while the sum is 68.

The spelling of 831955597457 in words is "eight hundred thirty-one billion, nine hundred fifty-five million, five hundred ninety-seven thousand, four hundred fifty-seven".