1557055434440 has 64 divisors (see below), whose sum is σ = 3859703680320. Its totient is φ = 560596000000.

The previous prime is 1557055434421. The next prime is 1557055434509. The reversal of 1557055434440 is 444345507551.

It is a super-2 number, since 2×1557055434440² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17474186 + ... + 17563065.

It is an arithmetic number, because the mean of its divisors is an integer number (60307870005).

Almost surely, 2^{1557055434440} is an apocalyptic number.

1557055434440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1557055434440 is an abundant number, since it is smaller than the sum of its proper divisors (2302648245880).

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

1557055434440 is a wasteful number, since it uses less digits than its factorization.

1557055434440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35037374 (or 35037370 counting only the distinct ones).

The product of its (nonzero) digits is 3360000, while the sum is 47.

The spelling of 1557055434440 in words is "one trillion, five hundred fifty-seven billion, fifty-five million, four hundred thirty-four thousand, four hundred forty".