1557466021440 has 896 divisors, whose sum is σ = 6697814676480. Its totient is φ = 332575801344.

The previous prime is 1557466021411. The next prime is 1557466021451. The reversal of 1557466021440 is 441206647551.

1557466021440 is a `hidden beast` number, since 1 + 5 + 574 + 6 + 60 + 2 + 14 + 4 + 0 = 666.

It is a super-3 number, since 3×1557466021440³ (a number of 38 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 140852392 + ... + 140863448.

Almost surely, 2^{1557466021440} is an apocalyptic number.

1557466021440 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 1557466021440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3348907338240).

1557466021440 is an abundant number, since it is smaller than the sum of its proper divisors (5140348655040).

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

1557466021440 is a wasteful number, since it uses less digits than its factorization.

1557466021440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11244 (or 11228 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 1557466021440 in words is "one trillion, five hundred fifty-seven billion, four hundred sixty-six million, twenty-one thousand, four hundred forty".