1557360481 has 4 divisors (see below), whose sum is σ = 1557441172. Its totient is φ = 1557279792.

The previous prime is 1557360461. The next prime is 1557360509. The reversal of 1557360481 is 1840637551.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1840637551 = 8419 ⋅218629.

It can be written as a sum of positive squares in 2 ways, for example, as 1202979856 + 354380625 = 34684^2 + 18825^2 .

It is a cyclic number.

It is not a de Polignac number, because 1557360481 - 2⁵ = 1557360449 is a prime.

It is a super-2 number, since 2×1557360481² = 4850743335561102722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1557360461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7591 + ... + 56323.

It is an arithmetic number, because the mean of its divisors is an integer number (389360293).

Almost surely, 2^1557360481 is an apocalyptic number.

It is an amenable number.

1557360481 is a deficient number, since it is larger than the sum of its proper divisors (80691).

1557360481 is an equidigital number, since it uses as much as digits as its factorization.

1557360481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80690.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 1557360481 is about 39463.4068600267. The cubic root of 1557360481 is about 1159.1235157182.

The spelling of 1557360481 in words is "one billion, five hundred fifty-seven million, three hundred sixty thousand, four hundred eighty-one".