1557112553 has 2 divisors, whose sum is σ = 1557112554. Its totient is φ = 1557112552.

The previous prime is 1557112549. The next prime is 1557112561. The reversal of 1557112553 is 3552117551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1268214544 + 288898009 = 35612^2 + 16997^2 .

It is a cyclic number.

It is not a de Polignac number, because 1557112553 - 2² = 1557112549 is a prime.

It is not a weakly prime, because it can be changed into another prime (1557112153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778556276 + 778556277.

It is an arithmetic number, because the mean of its divisors is an integer number (778556277).

Almost surely, 2^1557112553 is an apocalyptic number.

It is an amenable number.

1557112553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1557112553 is an equidigital number, since it uses as much as digits as its factorization.

1557112553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26250, while the sum is 35.

The square root of 1557112553 is about 39460.2654958124. The cubic root of 1557112553 is about 1159.0620025726.

The spelling of 1557112553 in words is "one billion, five hundred fifty-seven million, one hundred twelve thousand, five hundred fifty-three".