7886474644 has 6 divisors (see below), whose sum is σ = 13801330634. Its totient is φ = 3943237320.

The previous prime is 7886474639. The next prime is 7886474653. The reversal of 7886474644 is 4464746887.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7337978244 + 548496400 = 85662^2 + 23420^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985809327 + ... + 985809334.

Almost surely, 2^7886474644 is an apocalyptic number.

It is an amenable number.

7886474644 is a deficient number, since it is larger than the sum of its proper divisors (5914855990).

7886474644 is a wasteful number, since it uses less digits than its factorization.

7886474644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971618665 (or 1971618663 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 58.

The square root of 7886474644 is about 88805.8255071141. The cubic root of 7886474644 is about 1990.4944474755.

The spelling of 7886474644 in words is "seven billion, eight hundred eighty-six million, four hundred seventy-four thousand, six hundred forty-four".