847949988964 has 81 divisors (see below), whose sum is σ = 1626912786681. Its totient is φ = 386532637920.

The previous prime is 847949988943. The next prime is 847949988967. The reversal of 847949988964 is 469889949748.

It is a happy number.

The square root of 847949988964 is 920842.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 125436388900 + 722513600064 = 354170^2 + 850008^2 .

It is not an unprimeable number, because it can be changed into a prime (847949988967) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2561782279 + ... + 2561782609.

Almost surely, 2^847949988964 is an apocalyptic number.

847949988964 is the 920842-nd square number.

It is an amenable number.

847949988964 is a deficient number, since it is larger than the sum of its proper divisors (778962797717).

847949988964 is a wasteful number, since it uses less digits than its factorization.

847949988964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906 (or 453 counting only the distinct ones).

The product of its digits is 9029615616, while the sum is 85.

The spelling of 847949988964 in words is "eight hundred forty-seven billion, nine hundred forty-nine million, nine hundred eighty-eight thousand, nine hundred sixty-four".