2159777879 has 16 divisors (see below), whose sum is σ = 2489614848. Its totient is φ = 1835320032.

The previous prime is 2159777857. The next prime is 2159777891. The reversal of 2159777879 is 9787779512.

It is not a de Polignac number, because 2159777879 - 2¹² = 2159773783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2159797879) 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, 550844 + ... + 554750.

It is an arithmetic number, because the mean of its divisors is an integer number (155600928).

Almost surely, 2^2159777879 is an apocalyptic number.

2159777879 is a deficient number, since it is larger than the sum of its proper divisors (329836969).

2159777879 is a wasteful number, since it uses less digits than its factorization.

2159777879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4574.

The product of its digits is 15558480, while the sum is 62.

The square root of 2159777879 is about 46473.4104515690. The cubic root of 2159777879 is about 1292.6165027606.

The spelling of 2159777879 in words is "two billion, one hundred fifty-nine million, seven hundred seventy-seven thousand, eight hundred seventy-nine".