1557425144 has 32 divisors (see below), whose sum is σ = 3187825200. Its totient is φ = 707435520.

The previous prime is 1557425141. The next prime is 1557425153. The reversal of 1557425144 is 4415247551.

It is a junction number, because it is equal to n+sod(n) for n = 1557425098 and 1557425107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557425141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144122 + ... + 154550.

Almost surely, 2^1557425144 is an apocalyptic number.

It is an amenable number.

1557425144 is an abundant number, since it is smaller than the sum of its proper divisors (1630400056).

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

1557425144 is a wasteful number, since it uses less digits than its factorization.

1557425144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12143 (or 12139 counting only the distinct ones).

The product of its digits is 112000, while the sum is 38.

The square root of 1557425144 is about 39464.2261294961. The cubic root of 1557425144 is about 1159.1395581112.

The spelling of 1557425144 in words is "one billion, five hundred fifty-seven million, four hundred twenty-five thousand, one hundred forty-four".