681920292031 has 8 divisors (see below), whose sum is σ = 764018804304. Its totient is φ = 603172739520.

The previous prime is 681920292029. The next prime is 681920292089. The reversal of 681920292031 is 130292029186.

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 681920292031 - 2¹ = 681920292029 is a prime.

It is a super-2 number, since 2×681920292031² (a number of 24 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 (681920295031) 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, 837739510 + ... + 837740323.

It is an arithmetic number, because the mean of its divisors is an integer number (95502350538).

Almost surely, 2^681920292031 is an apocalyptic number.

681920292031 is a deficient number, since it is larger than the sum of its proper divisors (82098512273).

681920292031 is a wasteful number, since it uses less digits than its factorization.

681920292031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675479881.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 681920292031 in words is "six hundred eighty-one billion, nine hundred twenty million, two hundred ninety-two thousand, thirty-one".