7688517690 has 64 divisors (see below), whose sum is σ = 21179149056. Its totient is φ = 1749821952.

The previous prime is 7688517689. The next prime is 7688517757. The reversal of 7688517690 is 967158867.

It is a super-2 number, since 2×7688517690² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7688517690.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29637 + ... + 127496.

It is an arithmetic number, because the mean of its divisors is an integer number (330924204).

Almost surely, 2^7688517690 is an apocalyptic number.

7688517690 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

7688517690 is an abundant number, since it is smaller than the sum of its proper divisors (13490631366).

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

7688517690 is a wasteful number, since it uses less digits than its factorization.

7688517690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157383.

The product of its (nonzero) digits is 5080320, while the sum is 57.

The square root of 7688517690 is about 87684.1929312234. The cubic root of 7688517690 is about 1973.6987799091.

The spelling of 7688517690 in words is "seven billion, six hundred eighty-eight million, five hundred seventeen thousand, six hundred ninety".