2156549615 has 8 divisors (see below), whose sum is σ = 2823119568. Its totient is φ = 1568399680.

The previous prime is 2156549599. The next prime is 2156549623. The reversal of 2156549615 is 5169456512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2156549615 - 2⁴ = 2156549599 is a prime.

It is a Duffinian 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, 19604942 + ... + 19605051.

It is an arithmetic number, because the mean of its divisors is an integer number (352889946).

Almost surely, 2^2156549615 is an apocalyptic number.

2156549615 is a deficient number, since it is larger than the sum of its proper divisors (666569953).

2156549615 is a wasteful number, since it uses less digits than its factorization.

2156549615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39210009.

The product of its digits is 324000, while the sum is 44.

The square root of 2156549615 is about 46438.6650863265. The cubic root of 2156549615 is about 1291.9721482029.

The spelling of 2156549615 in words is "two billion, one hundred fifty-six million, five hundred forty-nine thousand, six hundred fifteen".