1557857858485 has 8 divisors (see below), whose sum is σ = 1869469302456. Its totient is φ = 1246259705280.

The previous prime is 1557857858461. The next prime is 1557857858521. The reversal of 1557857858485 is 5848587587551.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 121076857521 + 1436781000964 = 347961^2 + 1198658^2 .

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

It is not a de Polignac number, because 1557857858485 - 2²¹ = 1557855761333 is a prime.

It is a super-2 number, since 2×1557857858485² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3062974 + ... + 3535183.

It is an arithmetic number, because the mean of its divisors is an integer number (233683662807).

Almost surely, 2^{1557857858485} is an apocalyptic number.

It is an amenable number.

1557857858485 is a deficient number, since it is larger than the sum of its proper divisors (311611443971).

1557857858485 is an equidigital number, since it uses as much as digits as its factorization.

1557857858485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6645383.

The product of its digits is 2508800000, while the sum is 76.

The spelling of 1557857858485 in words is "one trillion, five hundred fifty-seven billion, eight hundred fifty-seven million, eight hundred fifty-eight thousand, four hundred eighty-five".