390891521337 has 16 divisors (see below), whose sum is σ = 529310868480. Its totient is φ = 256538308752.

The previous prime is 390891521323. The next prime is 390891521353. The reversal of 390891521337 is 733125198093.

It is not a de Polignac number, because 390891521337 - 2¹² = 390891517241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 390891521337.

It is not an unprimeable number, because it can be changed into a prime (390891531337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320037 + ... + 940322.

It is an arithmetic number, because the mean of its divisors is an integer number (33081929280).

Almost surely, 2^390891521337 is an apocalyptic number.

It is an amenable number.

390891521337 is a deficient number, since it is larger than the sum of its proper divisors (138419347143).

390891521337 is a wasteful number, since it uses less digits than its factorization.

390891521337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261972.

The product of its (nonzero) digits is 1224720, while the sum is 51.

The spelling of 390891521337 in words is "three hundred ninety billion, eight hundred ninety-one million, five hundred twenty-one thousand, three hundred thirty-seven".