813732681377 has 16 divisors (see below), whose sum is σ = 1058633597952. Its totient is φ = 606508829520.

The previous prime is 813732681373. The next prime is 813732681481. The reversal of 813732681377 is 773186237318.

It is not a de Polignac number, because 813732681377 - 2² = 813732681373 is a prime.

It is a super-2 number, since 2×813732681377² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (813732681373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229736423 + ... + 229739964.

It is an arithmetic number, because the mean of its divisors is an integer number (66164599872).

Almost surely, 2^813732681377 is an apocalyptic number.

It is an amenable number.

813732681377 is a deficient number, since it is larger than the sum of its proper divisors (244900916575).

813732681377 is a wasteful number, since it uses less digits than its factorization.

813732681377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459476428.

The product of its digits is 7112448, while the sum is 56.

The spelling of 813732681377 in words is "eight hundred thirteen billion, seven hundred thirty-two million, six hundred eighty-one thousand, three hundred seventy-seven".