7318499157 has 12 divisors (see below), whose sum is σ = 10629572044. Its totient is φ = 4852042560.

The previous prime is 7318499141. The next prime is 7318499179. The reversal of 7318499157 is 7519948137.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1996213041 + 5322286116 = 44679^2 + 72954^2 .

It is not a de Polignac number, because 7318499157 - 2⁴ = 7318499141 is a prime.

It is a super-2 number, since 2×7318499157² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7318499257) 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, 2244688 + ... + 2247945.

Almost surely, 2^7318499157 is an apocalyptic number.

It is an amenable number.

7318499157 is a deficient number, since it is larger than the sum of its proper divisors (3311072887).

7318499157 is a wasteful number, since it uses less digits than its factorization.

7318499157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4492820 (or 4492817 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The square root of 7318499157 is about 85548.2270827397. The cubic root of 7318499157 is about 1941.5146669137.

The spelling of 7318499157 in words is "seven billion, three hundred eighteen million, four hundred ninety-nine thousand, one hundred fifty-seven".