1557480000438 has 48 divisors (see below), whose sum is σ = 3761097228720. Its totient is φ = 462904270848.

The previous prime is 1557480000407. The next prime is 1557480000443. The reversal of 1557480000438 is 8340000847551.

It is a junction number, because it is equal to n+sod(n) for n = 1557480000393 and 1557480000402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133936395 + ... + 133948022.

It is an arithmetic number, because the mean of its divisors is an integer number (78356192265).

Almost surely, 2^{1557480000438} is an apocalyptic number.

1557480000438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1557480000438 is an abundant number, since it is smaller than the sum of its proper divisors (2203617228282).

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

1557480000438 is a wasteful number, since it uses less digits than its factorization.

1557480000438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267884461 (or 267884458 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

Adding to 1557480000438 its reverse (8340000847551), we get a palindrome (9897480847989).

The spelling of 1557480000438 in words is "one trillion, five hundred fifty-seven billion, four hundred eighty million, four hundred thirty-eight", and thus it is an aban number.