8157718264 has 32 divisors (see below), whose sum is σ = 15717759120. Its totient is φ = 3966437376.

The previous prime is 8157718253. The next prime is 8157718313. The reversal of 8157718264 is 4628177518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 618927 + ... + 631969.

Almost surely, 2^8157718264 is an apocalyptic number.

It is an amenable number.

8157718264 is a deficient number, since it is larger than the sum of its proper divisors (7560040856).

8157718264 is a wasteful number, since it uses less digits than its factorization.

8157718264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15199 (or 15195 counting only the distinct ones).

The product of its digits is 752640, while the sum is 49.

The square root of 8157718264 is about 90320.0878210379. The cubic root of 8157718264 is about 2013.0577507058.

The spelling of 8157718264 in words is "eight billion, one hundred fifty-seven million, seven hundred eighteen thousand, two hundred sixty-four".