7318811394 has 24 divisors (see below), whose sum is σ = 15864155580. Its totient is φ = 2438568288.

The previous prime is 7318811371. The next prime is 7318811399. The reversal of 7318811394 is 4931188137.

7318811394 is a `hidden beast` number, since 73 + 188 + 11 + 394 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7218711369 + 100100025 = 84963^2 + 10005^2 .

It is not an unprimeable number, because it can be changed into a prime (7318811399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42097 + ... + 128100.

Almost surely, 2^7318811394 is an apocalyptic number.

7318811394 is an abundant number, since it is smaller than the sum of its proper divisors (8545344186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7318811394 is a wasteful number, since it uses less digits than its factorization.

7318811394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172594 (or 172591 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 7318811394 is about 85550.0519812817. The cubic root of 7318811394 is about 1941.5422774971.

The spelling of 7318811394 in words is "seven billion, three hundred eighteen million, eight hundred eleven thousand, three hundred ninety-four".