681133373731 has 8 divisors (see below), whose sum is σ = 737972137584. Its totient is φ = 626158176000.

The previous prime is 681133373573. The next prime is 681133373771. The reversal of 681133373731 is 137373331186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 681133373731 - 2¹⁷ = 681133242659 is a prime.

It is a super-2 number, since 2×681133373731² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681133373771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465890770 + ... + 465892231.

It is an arithmetic number, because the mean of its divisors is an integer number (92246517198).

Almost surely, 2^681133373731 is an apocalyptic number.

681133373731 is a deficient number, since it is larger than the sum of its proper divisors (56838763853).

681133373731 is a wasteful number, since it uses less digits than its factorization.

681133373731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931783061.

The product of its digits is 571536, while the sum is 46.

The spelling of 681133373731 in words is "six hundred eighty-one billion, one hundred thirty-three million, three hundred seventy-three thousand, seven hundred thirty-one".