681830742831 has 48 divisors (see below), whose sum is σ = 1067878857600. Its totient is φ = 385809251520.

The previous prime is 681830742823. The next prime is 681830742881. The reversal of 681830742831 is 138247038186.

It is not a de Polignac number, because 681830742831 - 2³ = 681830742823 is a prime.

It is a super-2 number, since 2×681830742831² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681830742881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42444541 + ... + 42460601.

It is an arithmetic number, because the mean of its divisors is an integer number (22247476200).

Almost surely, 2^681830742831 is an apocalyptic number.

681830742831 is a deficient number, since it is larger than the sum of its proper divisors (386048114769).

681830742831 is a wasteful number, since it uses less digits than its factorization.

681830742831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18884 (or 18877 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 681830742831 in words is "six hundred eighty-one billion, eight hundred thirty million, seven hundred forty-two thousand, eight hundred thirty-one".