1557892097840 has 160 divisors (see below), whose sum is σ = 3997640134656. Its totient is φ = 560942161920.

The previous prime is 1557892097807. The next prime is 1557892097857. The reversal of 1557892097840 is 487902987551.

It is a super-2 number, since 2×1557892097840² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114822737 + ... + 114836303.

Almost surely, 2^{1557892097840} is an apocalyptic number.

1557892097840 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 1557892097840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1998820067328).

1557892097840 is an abundant number, since it is smaller than the sum of its proper divisors (2439748036816).

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

1557892097840 is a wasteful number, since it uses less digits than its factorization.

1557892097840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16327 (or 16321 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 65.

The spelling of 1557892097840 in words is "one trillion, five hundred fifty-seven billion, eight hundred ninety-two million, ninety-seven thousand, eight hundred forty".