1557383247551 has 8 divisors (see below), whose sum is σ = 1600815448464. Its totient is φ = 1514021613120.

The previous prime is 1557383247533. The next prime is 1557383247557. The reversal of 1557383247551 is 1557423837551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1557383247551 - 2¹⁸ = 1557382985407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557383247557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17596865 + ... + 17685146.

It is an arithmetic number, because the mean of its divisors is an integer number (200101931058).

Almost surely, 2^{1557383247551} is an apocalyptic number.

1557383247551 is a deficient number, since it is larger than the sum of its proper divisors (43432200913).

1557383247551 is a wasteful number, since it uses less digits than its factorization.

1557383247551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35283241.

The product of its digits is 17640000, while the sum is 56.

The spelling of 1557383247551 in words is "one trillion, five hundred fifty-seven billion, three hundred eighty-three million, two hundred forty-seven thousand, five hundred fifty-one".