807534791381 has 4 divisors (see below), whose sum is σ = 835380818700. Its totient is φ = 779688764064.

The previous prime is 807534791359. The next prime is 807534791387. The reversal of 807534791381 is 183197435708.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 474501923281 + 333032868100 = 688841^2 + 577090^2 .

It is a cyclic number.

It is not a de Polignac number, because 807534791381 - 2¹⁰ = 807534790357 is a prime.

It is a super-2 number, since 2×807534791381² (a number of 25 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 (807534791387) 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, 13923013616 + ... + 13923013673.

It is an arithmetic number, because the mean of its divisors is an integer number (208845204675).

Almost surely, 2^807534791381 is an apocalyptic number.

It is an amenable number.

807534791381 is a deficient number, since it is larger than the sum of its proper divisors (27846027319).

807534791381 is a wasteful number, since it uses less digits than its factorization.

807534791381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27846027318.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 807534791381 in words is "eight hundred seven billion, five hundred thirty-four million, seven hundred ninety-one thousand, three hundred eighty-one".