9115381690 has 16 divisors (see below), whose sum is σ = 16432521480. Its totient is φ = 3640633920.

The previous prime is 9115381687. The next prime is 9115381697. The reversal of 9115381690 is 961835119.

It can be written as a sum of positive squares in 4 ways, for example, as 8760398409 + 354983281 = 93597^2 + 18841^2 .

It is a super-2 number, since 2×9115381690² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9115381697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 682905 + ... + 696124.

Almost surely, 2^9115381690 is an apocalyptic number.

9115381690 is a deficient number, since it is larger than the sum of its proper divisors (7317139790).

9115381690 is a wasteful number, since it uses less digits than its factorization.

9115381690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379697.

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 9115381690 is about 95474.5080636711. The cubic root of 9115381690 is about 2088.9351267377.

The spelling of 9115381690 in words is "nine billion, one hundred fifteen million, three hundred eighty-one thousand, six hundred ninety".