1538172160 has 72 divisors (see below), whose sum is σ = 4210770816. Its totient is φ = 527370240.

The previous prime is 1538172143. The next prime is 1538172197. The reversal of 1538172160 is 612718351.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76876 + ... + 94795.

It is an arithmetic number, because the mean of its divisors is an integer number (58482928).

Almost surely, 2^1538172160 is an apocalyptic number.

1538172160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1538172160 is an abundant number, since it is smaller than the sum of its proper divisors (2672598656).

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

1538172160 is an equidigital number, since it uses as much as digits as its factorization.

1538172160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171699 (or 171685 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1538172160 is about 39219.5379880998. The cubic root of 1538172160 is about 1154.3432884022.

The spelling of 1538172160 in words is "one billion, five hundred thirty-eight million, one hundred seventy-two thousand, one hundred sixty".