1915316138 has 4 divisors (see below), whose sum is σ = 2872974210. Its totient is φ = 957658068.

The previous prime is 1915316113. The next prime is 1915316171. The reversal of 1915316138 is 8316135191.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1719512089 + 195804049 = 41467^2 + 13993^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 478829033 + ... + 478829036.

Almost surely, 2^1915316138 is an apocalyptic number.

1915316138 is a deficient number, since it is larger than the sum of its proper divisors (957658072).

1915316138 is an equidigital number, since it uses as much as digits as its factorization.

1915316138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957658071.

The product of its digits is 19440, while the sum is 38.

The square root of 1915316138 is about 43764.3249462390. The cubic root of 1915316138 is about 1241.8814955006.

The spelling of 1915316138 in words is "one billion, nine hundred fifteen million, three hundred sixteen thousand, one hundred thirty-eight".