394880517745 has 32 divisors (see below), whose sum is σ = 542285183232. Its totient is φ = 270408160512.

The previous prime is 394880517719. The next prime is 394880517751. The reversal of 394880517745 is 547715088493.

It is not a de Polignac number, because 394880517745 - 2¹³ = 394880509553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138894294 + ... + 138897136.

It is an arithmetic number, because the mean of its divisors is an integer number (16946411976).

Almost surely, 2^394880517745 is an apocalyptic number.

394880517745 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

394880517745 is a deficient number, since it is larger than the sum of its proper divisors (147404665487).

394880517745 is a wasteful number, since it uses less digits than its factorization.

394880517745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6841.

The product of its (nonzero) digits is 33868800, while the sum is 61.

The spelling of 394880517745 in words is "three hundred ninety-four billion, eight hundred eighty million, five hundred seventeen thousand, seven hundred forty-five".