1959318138 has 16 divisors (see below), whose sum is σ = 3985054560. Its totient is φ = 642036336.

The previous prime is 1959318131. The next prime is 1959318149. The reversal of 1959318138 is 8318139591.

1959318138 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1959318131) 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, 2767045 + ... + 2767752.

It is an arithmetic number, because the mean of its divisors is an integer number (249065910).

Almost surely, 2^1959318138 is an apocalyptic number.

1959318138 is an abundant number, since it is smaller than the sum of its proper divisors (2025736422).

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

1959318138 is a wasteful number, since it uses less digits than its factorization.

1959318138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5534861.

The product of its digits is 233280, while the sum is 48.

The square root of 1959318138 is about 44264.1857261602. The cubic root of 1959318138 is about 1251.3198087667.

The spelling of 1959318138 in words is "one billion, nine hundred fifty-nine million, three hundred eighteen thousand, one hundred thirty-eight".