2159405672 has 16 divisors (see below), whose sum is σ = 4049952900. Its totient is φ = 1079418240.

The previous prime is 2159405653. The next prime is 2159405683. The reversal of 2159405672 is 2765049512.

It can be written as a sum of positive squares in 2 ways, for example, as 2097090436 + 62315236 = 45794^2 + 7894^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1397 + ... + 65732.

Almost surely, 2^2159405672 is an apocalyptic number.

It is an amenable number.

2159405672 is a deficient number, since it is larger than the sum of its proper divisors (1890547228).

2159405672 is a wasteful number, since it uses less digits than its factorization.

2159405672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71156 (or 71152 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 2159405672 is about 46469.4057633622. The cubic root of 2159405672 is about 1292.5422438046.

The spelling of 2159405672 in words is "two billion, one hundred fifty-nine million, four hundred five thousand, six hundred seventy-two".