2149842578 has 24 divisors (see below), whose sum is σ = 3501232128. Its totient is φ = 989584752.

The previous prime is 2149842521. The next prime is 2149842589. The reversal of 2149842578 is 8752489412.

It is a super-2 number, since 2×2149842578² = 9243646220363372168, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121151 + ... + 137757.

It is an arithmetic number, because the mean of its divisors is an integer number (145884672).

Almost surely, 2^2149842578 is an apocalyptic number.

2149842578 is a deficient number, since it is larger than the sum of its proper divisors (1351389550).

2149842578 is a wasteful number, since it uses less digits than its factorization.

2149842578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17018 (or 17005 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 50.

The square root of 2149842578 is about 46366.3949213221. The cubic root of 2149842578 is about 1290.6313793266.

The spelling of 2149842578 in words is "two billion, one hundred forty-nine million, eight hundred forty-two thousand, five hundred seventy-eight".