2156876819 has 16 divisors (see below), whose sum is σ = 2409860160. Its totient is φ = 1919892480.

The previous prime is 2156876807. The next prime is 2156876831. The reversal of 2156876819 is 9186786512.

It is an interprime number because it is at equal distance from previous prime (2156876807) and next prime (2156876831).

It is a cyclic number.

It is not a de Polignac number, because 2156876819 - 2⁴ = 2156876803 is a prime.

It is a super-2 number, since 2×2156876819² = 9304235224679117522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2156876419) 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, 3809 + ... + 65789.

It is an arithmetic number, because the mean of its divisors is an integer number (150616260).

Almost surely, 2^2156876819 is an apocalyptic number.

2156876819 is a deficient number, since it is larger than the sum of its proper divisors (252983341).

2156876819 is a wasteful number, since it uses less digits than its factorization.

2156876819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62110.

The product of its digits is 1451520, while the sum is 53.

The square root of 2156876819 is about 46442.1879221899. The cubic root of 2156876819 is about 1292.0374866914.

The spelling of 2156876819 in words is "two billion, one hundred fifty-six million, eight hundred seventy-six thousand, eight hundred nineteen".