1557163374477 has 4 divisors (see below), whose sum is σ = 2076217832640. Its totient is φ = 1038108916316.

The previous prime is 1557163374467. The next prime is 1557163374479. The reversal of 1557163374477 is 7744733617551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1557163374477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1557163374477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557163374479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259527229077 + ... + 259527229082.

It is an arithmetic number, because the mean of its divisors is an integer number (519054458160).

Almost surely, 2^{1557163374477} is an apocalyptic number.

It is an amenable number.

1557163374477 is a deficient number, since it is larger than the sum of its proper divisors (519054458163).

1557163374477 is an equidigital number, since it uses as much as digits as its factorization.

1557163374477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519054458162.

The product of its digits is 51861600, while the sum is 60.

The spelling of 1557163374477 in words is "one trillion, five hundred fifty-seven billion, one hundred sixty-three million, three hundred seventy-four thousand, four hundred seventy-seven".