1557844992000 has 1344 divisors, whose sum is σ = 6226047479808. Its totient is φ = 374685696000.

The previous prime is 1557844991903. The next prime is 1557844992001. The reversal of 1557844992000 is 2994487551.

It is a happy number.

1557844992000 is a `hidden beast` number, since 1 + 5 + 57 + 84 + 499 + 20 + 0 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (1557844992001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12266495937 + ... + 12266496063.

Almost surely, 2^{1557844992000} is an apocalyptic number.

1557844992000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1557844992000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3113023739904).

1557844992000 is an abundant number, since it is smaller than the sum of its proper divisors (4668202487808).

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

1557844992000 is an equidigital number, since it uses as much as digits as its factorization.

1557844992000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 1557844992000 in words is "one trillion, five hundred fifty-seven billion, eight hundred forty-four million, nine hundred ninety-two thousand".