394872519508 has 12 divisors (see below), whose sum is σ = 700493031700. Its totient is φ = 194731653312.

The previous prime is 394872519469. The next prime is 394872519521. The reversal of 394872519508 is 805915278493.

It can be written as a sum of positive squares in 2 ways, for example, as 326431680964 + 68440838544 = 571342^2 + 261612^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676151283 + ... + 676151866.

Almost surely, 2^394872519508 is an apocalyptic number.

It is an amenable number.

394872519508 is a deficient number, since it is larger than the sum of its proper divisors (305620512192).

394872519508 is a wasteful number, since it uses less digits than its factorization.

394872519508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352303226 (or 1352303224 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 61.

The spelling of 394872519508 in words is "three hundred ninety-four billion, eight hundred seventy-two million, five hundred nineteen thousand, five hundred eight".