4156439972 has 12 divisors (see below), whose sum is σ = 7276771740. Its totient is φ = 2077362336.

The previous prime is 4156439951. The next prime is 4156439983. The reversal of 4156439972 is 2799346514.

It can be written as a sum of positive squares in 2 ways, for example, as 3247176256 + 909263716 = 56984^2 + 30154^2 .

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 4156439972.

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, 203447 + ... + 222942.

It is an arithmetic number, because the mean of its divisors is an integer number (606397645).

Almost surely, 2^4156439972 is an apocalyptic number.

It is an amenable number.

4156439972 is a deficient number, since it is larger than the sum of its proper divisors (3120331768).

4156439972 is a wasteful number, since it uses less digits than its factorization.

4156439972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428830 (or 428828 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 50.

The square root of 4156439972 is about 64470.4581339391. The cubic root of 4156439972 is about 1607.8313937758.

The spelling of 4156439972 in words is "four billion, one hundred fifty-six million, four hundred thirty-nine thousand, nine hundred seventy-two".