139553614818 has 54 divisors (see below), whose sum is σ = 304618296801. Its totient is φ = 46173944400.

The previous prime is 139553614817. The next prime is 139553614853. The reversal of 139553614818 is 818416355931.

139553614818 is a `hidden beast` number, since 1 + 3 + 9 + 5 + 5 + 3 + 614 + 8 + 18 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 134904147849 + 4649466969 = 367293^2 + 68187^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=264153.

It is a super-2 number, since 2×139553614818² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139553614817) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 302719108 + ... + 302719568.

Almost surely, 2^139553614818 is an apocalyptic number.

139553614818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

139553614818 is an abundant number, since it is smaller than the sum of its proper divisors (165064681983).

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

139553614818 is an frugal number, since it uses more digits than its factorization.

139553614818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312 (or 657 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The spelling of 139553614818 in words is "one hundred thirty-nine billion, five hundred fifty-three million, six hundred fourteen thousand, eight hundred eighteen".