2557086499969 has 8 divisors (see below), whose sum is σ = 2557821813480. Its totient is φ = 2556351305856.

The previous prime is 2557086499901. The next prime is 2557086499973. The reversal of 2557086499969 is 9699946807552.

It can be written as a sum of positive squares in 4 ways, for example, as 14656249969 + 2542430250000 = 121063^2 + 1594500^2 .

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 2557086499969 - 2¹¹ = 2557086497921 is a prime.

It is a super-2 number, since 2×2557086499969² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2557086469969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57501147 + ... + 57545599.

It is an arithmetic number, because the mean of its divisors is an integer number (319727726685).

Almost surely, 2^{2557086499969} is an apocalyptic number.

It is an amenable number.

2557086499969 is a deficient number, since it is larger than the sum of its proper divisors (735313511).

2557086499969 is an equidigital number, since it uses as much as digits as its factorization.

2557086499969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59699.

The product of its (nonzero) digits is 2645395200, while the sum is 79.

The spelling of 2557086499969 in words is "two trillion, five hundred fifty-seven billion, eighty-six million, four hundred ninety-nine thousand, nine hundred sixty-nine".