1557272110720 has 128 divisors (see below), whose sum is σ = 3784703227200. Its totient is φ = 612644044800.

The previous prime is 1557272110697. The next prime is 1557272110763. The reversal of 1557272110720 is 270112727551.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9436920 + ... + 9600520.

Almost surely, 2^{1557272110720} is an apocalyptic number.

1557272110720 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 1557272110720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1892351613600).

1557272110720 is an abundant number, since it is smaller than the sum of its proper divisors (2227431116480).

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

1557272110720 is a wasteful number, since it uses less digits than its factorization.

1557272110720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163866 (or 163854 counting only the distinct ones).

The product of its (nonzero) digits is 68600, while the sum is 40.

The spelling of 1557272110720 in words is "one trillion, five hundred fifty-seven billion, two hundred seventy-two million, one hundred ten thousand, seven hundred twenty".