1578162879 has 16 divisors (see below), whose sum is σ = 2338918240. Its totient is φ = 1051704000.

The previous prime is 1578162847. The next prime is 1578162881. The reversal of 1578162879 is 9782618751.

1578162879 is a `hidden beast` number, since 1 + 5 + 7 + 8 + 1 + 628 + 7 + 9 = 666.

It is not a de Polignac number, because 1578162879 - 2⁵ = 1578162847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1578162829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71289 + ... + 90765.

It is an arithmetic number, because the mean of its divisors is an integer number (146182390).

Almost surely, 2^1578162879 is an apocalyptic number.

1578162879 is a deficient number, since it is larger than the sum of its proper divisors (760755361).

1578162879 is a wasteful number, since it uses less digits than its factorization.

1578162879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22487 (or 22481 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 54.

The square root of 1578162879 is about 39726.0982101187. The cubic root of 1578162879 is about 1164.2616918791.

The spelling of 1578162879 in words is "one billion, five hundred seventy-eight million, one hundred sixty-two thousand, eight hundred seventy-nine".