2156439476 has 12 divisors (see below), whose sum is σ = 3875763108. Its totient is φ = 1049078592.

The previous prime is 2156439427. The next prime is 2156439499. The reversal of 2156439476 is 6749346512.

It can be written as a sum of positive squares in 2 ways, for example, as 1964616976 + 191822500 = 44324^2 + 13850^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2156439476.

It is a congruent number.

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, 7285121 + ... + 7285416.

It is an arithmetic number, because the mean of its divisors is an integer number (322980259).

Almost surely, 2^2156439476 is an apocalyptic number.

It is an amenable number.

2156439476 is a deficient number, since it is larger than the sum of its proper divisors (1719323632).

2156439476 is a wasteful number, since it uses less digits than its factorization.

2156439476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14570578 (or 14570576 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 47.

The square root of 2156439476 is about 46437.4792166844. The cubic root of 2156439476 is about 1291.9501533549.

The spelling of 2156439476 in words is "two billion, one hundred fifty-six million, four hundred thirty-nine thousand, four hundred seventy-six".