1555115000660 has 48 divisors (see below), whose sum is σ = 3723831948816. Its totient is φ = 540420052992.

The previous prime is 1555115000627. The next prime is 1555115000669. The reversal of 1555115000660 is 660005115551.

It can be written as a sum of positive squares in 8 ways, for example, as 29623228996 + 1525491771664 = 172114^2 + 1235108^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1555115000660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555115000669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175913567 + ... + 175922406.

It is an arithmetic number, because the mean of its divisors is an integer number (77579832267).

Almost surely, 2^{1555115000660} is an apocalyptic number.

1555115000660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1555115000660 is an abundant number, since it is smaller than the sum of its proper divisors (2168716948156).

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

1555115000660 is a wasteful number, since it uses less digits than its factorization.

1555115000660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351836012 (or 351836010 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 1555115000660 in words is "one trillion, five hundred fifty-five billion, one hundred fifteen million, six hundred sixty", and thus it is an aban number.