1520395668 has 72 divisors (see below), whose sum is σ = 4281863040. Its totient is φ = 450917760.

The previous prime is 1520395649. The next prime is 1520395711. The reversal of 1520395668 is 8665930251.

1520395668 is a `hidden beast` number, since 1 + 52 + 0 + 39 + 566 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22233 + ... + 59456.

It is an arithmetic number, because the mean of its divisors is an integer number (59470320).

Almost surely, 2^1520395668 is an apocalyptic number.

1520395668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1520395668 is an abundant number, since it is smaller than the sum of its proper divisors (2761467372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1520395668 is a wasteful number, since it uses less digits than its factorization.

1520395668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81757 (or 81752 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 1520395668 is about 38992.2513840891. The cubic root of 1520395668 is about 1149.8791726867.

The spelling of 1520395668 in words is "one billion, five hundred twenty million, three hundred ninety-five thousand, six hundred sixty-eight".