1557185942372 has 6 divisors (see below), whose sum is σ = 2725075399158. Its totient is φ = 778592971184.

The previous prime is 1557185942369. The next prime is 1557185942399. The reversal of 1557185942372 is 2732495817551.

It can be written as a sum of positive squares in only one way, i.e., 1314476008036 + 242709934336 = 1146506^2 + 492656^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194648242793 + ... + 194648242800.

It is an arithmetic number, because the mean of its divisors is an integer number (454179233193).

Almost surely, 2^{1557185942372} is an apocalyptic number.

It is an amenable number.

1557185942372 is a deficient number, since it is larger than the sum of its proper divisors (1167889456786).

1557185942372 is a wasteful number, since it uses less digits than its factorization.

1557185942372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389296485597 (or 389296485595 counting only the distinct ones).

The product of its digits is 21168000, while the sum is 59.

The spelling of 1557185942372 in words is "one trillion, five hundred fifty-seven billion, one hundred eighty-five million, nine hundred forty-two thousand, three hundred seventy-two".