1557984492000 has 144 divisors (see below), whose sum is σ = 5529287089872. Its totient is φ = 415462521600.

The previous prime is 1557984491981. The next prime is 1557984492023. The reversal of 1557984492000 is 2944897551.

It is a happy number.

1557984492000 is a `hidden beast` number, since 1 + 5 + 5 + 79 + 84 + 492 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21602674 + ... + 21674673.

It is an arithmetic number, because the mean of its divisors is an integer number (38397827013).

Almost surely, 2^{1557984492000} is an apocalyptic number.

1557984492000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1557984492000 is an abundant number, since it is smaller than the sum of its proper divisors (3971302597872).

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

1557984492000 is a wasteful number, since it uses less digits than its factorization.

1557984492000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43277378 (or 43277357 counting only the distinct ones).

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

The spelling of 1557984492000 in words is "one trillion, five hundred fifty-seven billion, nine hundred eighty-four million, four hundred ninety-two thousand".