7718645252 has 12 divisors (see below), whose sum is σ = 14302195740. Its totient is φ = 3632303616.

The previous prime is 7718645219. The next prime is 7718645261. The reversal of 7718645252 is 2525468177.

It can be written as a sum of positive squares in 2 ways, for example, as 2073527296 + 5645117956 = 45536^2 + 75134^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7718645197 and 7718645206.

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, 56754677 + ... + 56754812.

It is an arithmetic number, because the mean of its divisors is an integer number (1191849645).

Almost surely, 2^7718645252 is an apocalyptic number.

It is an amenable number.

7718645252 is a deficient number, since it is larger than the sum of its proper divisors (6583550488).

7718645252 is a wasteful number, since it uses less digits than its factorization.

7718645252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113509510 (or 113509508 counting only the distinct ones).

The product of its digits is 940800, while the sum is 47.

The square root of 7718645252 is about 87855.8208202507. The cubic root of 7718645252 is about 1976.2734085040.

The spelling of 7718645252 in words is "seven billion, seven hundred eighteen million, six hundred forty-five thousand, two hundred fifty-two".