1557131646764 has 12 divisors (see below), whose sum is σ = 2818945222800. Its totient is φ = 751718725968.

The previous prime is 1557131646739. The next prime is 1557131646769. The reversal of 1557131646764 is 4676461317551.

It is not an unprimeable number, because it can be changed into a prime (1557131646769) 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, 6711774224 + ... + 6711774455.

It is an arithmetic number, because the mean of its divisors is an integer number (234912101900).

Almost surely, 2^{1557131646764} is an apocalyptic number.

It is an amenable number.

1557131646764 is a deficient number, since it is larger than the sum of its proper divisors (1261813576036).

1557131646764 is a wasteful number, since it uses less digits than its factorization.

1557131646764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13423548712 (or 13423548710 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 56.

The spelling of 1557131646764 in words is "one trillion, five hundred fifty-seven billion, one hundred thirty-one million, six hundred forty-six thousand, seven hundred sixty-four".