1555117557112 has 64 divisors (see below), whose sum is σ = 3410474791680. Its totient is φ = 650868244992.

The previous prime is 1555117557089. The next prime is 1555117557163. The reversal of 1555117557112 is 2117557115551.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14884768 + ... + 14988880.

It is an arithmetic number, because the mean of its divisors is an integer number (53288668620).

Almost surely, 2^{1555117557112} is an apocalyptic number.

It is an amenable number.

1555117557112 is an abundant number, since it is smaller than the sum of its proper divisors (1855357234568).

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

1555117557112 is a wasteful number, since it uses less digits than its factorization.

1555117557112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110372 (or 110368 counting only the distinct ones).

The product of its digits is 306250, while the sum is 46.

The spelling of 1555117557112 in words is "one trillion, five hundred fifty-five billion, one hundred seventeen million, five hundred fifty-seven thousand, one hundred twelve".