1518450138 has 28 divisors (see below), whose sum is σ = 3414953898. Its totient is φ = 506149560.

The previous prime is 1518450107. The next prime is 1518450163. The reversal of 1518450138 is 8310548151.

1518450138 is a `hidden beast` number, since 1 + 518 + 4 + 5 + 0 + 138 = 666.

It can be written as a sum of positive squares in only one way, i.e., 916091289 + 602358849 = 30267^2 + 24543^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 519273 + ... + 522188.

Almost surely, 2^1518450138 is an apocalyptic number.

1518450138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1518450138 is an abundant number, since it is smaller than the sum of its proper divisors (1896503760).

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

1518450138 is an equidigital number, since it uses as much as digits as its factorization.

1518450138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041481 (or 1041466 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The square root of 1518450138 is about 38967.2957491279. The cubic root of 1518450138 is about 1149.3884935438.

Adding to 1518450138 its reverse (8310548151), we get a palindrome (9828998289).

The spelling of 1518450138 in words is "one billion, five hundred eighteen million, four hundred fifty thousand, one hundred thirty-eight".