1556117161050 has 96 divisors (see below), whose sum is σ = 3996913377600. Its totient is φ = 400186984960.

The previous prime is 1556117161043. The next prime is 1556117161051. The reversal of 1556117161050 is 501617116551.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1556117161051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3519241 + ... + 3936659.

It is an arithmetic number, because the mean of its divisors is an integer number (41634514350).

Almost surely, 2^{1556117161050} is an apocalyptic number.

1556117161050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1556117161050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1998456688800).

1556117161050 is an abundant number, since it is smaller than the sum of its proper divisors (2440796216550).

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

1556117161050 is a wasteful number, since it uses less digits than its factorization.

1556117161050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418320 (or 418315 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 39.

The spelling of 1556117161050 in words is "one trillion, five hundred fifty-six billion, one hundred seventeen million, one hundred sixty-one thousand, fifty".