115138018490 has 128 divisors (see below), whose sum is σ = 241919758080. Its totient is φ = 39012710400.

The previous prime is 115138018487. The next prime is 115138018493. The reversal of 115138018490 is 94810831511.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (115138018487) and next prime (115138018493).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (115138018493) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 70333952 + ... + 70335588.

It is an arithmetic number, because the mean of its divisors is an integer number (1889998110).

Almost surely, 2^115138018490 is an apocalyptic number.

115138018490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115138018490 is an abundant number, since it is smaller than the sum of its proper divisors (126781739590).

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

115138018490 is a wasteful number, since it uses less digits than its factorization.

115138018490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208.

The product of its (nonzero) digits is 34560, while the sum is 41.

The spelling of 115138018490 in words is "one hundred fifteen billion, one hundred thirty-eight million, eighteen thousand, four hundred ninety".