7819471972 has 12 divisors (see below), whose sum is σ = 14736697276. Its totient is φ = 3608987040.

The previous prime is 7819471967. The next prime is 7819471987. The reversal of 7819471972 is 2791749187.

It can be written as a sum of positive squares in 2 ways, for example, as 2563801956 + 5255670016 = 50634^2 + 72496^2 .

It is a super-2 number, since 2×7819471972² (a number of 21 digits) contains 22 as substring.

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, 75187179 + ... + 75187282.

Almost surely, 2^7819471972 is an apocalyptic number.

It is an amenable number.

7819471972 is a deficient number, since it is larger than the sum of its proper divisors (6917225304).

7819471972 is a wasteful number, since it uses less digits than its factorization.

7819471972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150374478 (or 150374476 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 55.

The square root of 7819471972 is about 88427.7782826189. The cubic root of 7819471972 is about 1984.8413962997.

The spelling of 7819471972 in words is "seven billion, eight hundred nineteen million, four hundred seventy-one thousand, nine hundred seventy-two".