7894099856 has 10 divisors (see below), whose sum is σ = 15294818502. Its totient is φ = 3947049920.

The previous prime is 7894099819. The next prime is 7894099867. The reversal of 7894099856 is 6589904987.

It can be written as a sum of positive squares in only one way, i.e., 6606438400 + 1287661456 = 81280^2 + 35884^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7894099792 and 7894099801.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246690605 + ... + 246690636.

Almost surely, 2^7894099856 is an apocalyptic number.

It is an amenable number.

7894099856 is a deficient number, since it is larger than the sum of its proper divisors (7400718646).

7894099856 is a wasteful number, since it uses less digits than its factorization.

7894099856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493381249 (or 493381243 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 65.

The square root of 7894099856 is about 88848.7470705130. The cubic root of 7894099856 is about 1991.1357586548.

The spelling of 7894099856 in words is "seven billion, eight hundred ninety-four million, ninety-nine thousand, eight hundred fifty-six".