390680381581 has 8 divisors (see below), whose sum is σ = 465904554624. Its totient is φ = 320309381040.

The previous prime is 390680381573. The next prime is 390680381587. The reversal of 390680381581 is 185183086093.

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 390680381581 - 2³ = 390680381573 is a prime.

It is a super-2 number, since 2×390680381581² (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 (390680381587) 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, 1213292950 + ... + 1213293271.

It is an arithmetic number, because the mean of its divisors is an integer number (58238069328).

Almost surely, 2^390680381581 is an apocalyptic number.

It is an amenable number.

390680381581 is a deficient number, since it is larger than the sum of its proper divisors (75224173043).

390680381581 is a wasteful number, since it uses less digits than its factorization.

390680381581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426586251.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 390680381581 in words is "three hundred ninety billion, six hundred eighty million, three hundred eighty-one thousand, five hundred eighty-one".