1557723112320 has 1024 divisors, whose sum is σ = 5520337920000. Its totient is φ = 372354318336.

The previous prime is 1557723112289. The next prime is 1557723112327. The reversal of 1557723112320 is 232113277551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557723112327) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9004179754 + ... + 9004179926.

It is an arithmetic number, because the mean of its divisors is an integer number (5390955000).

Almost surely, 2^{1557723112320} is an apocalyptic number.

1557723112320 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 1557723112320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2760168960000).

1557723112320 is an abundant number, since it is smaller than the sum of its proper divisors (3962614807680).

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

1557723112320 is a wasteful number, since it uses less digits than its factorization.

1557723112320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 39.

Adding to 1557723112320 its reverse (232113277551), we get a palindrome (1789836389871).

The spelling of 1557723112320 in words is "one trillion, five hundred fifty-seven billion, seven hundred twenty-three million, one hundred twelve thousand, three hundred twenty".