2557068686 has 8 divisors (see below), whose sum is σ = 3846288240. Its totient is φ = 1274972608.

The previous prime is 2557068671. The next prime is 2557068691. The reversal of 2557068686 is 6868607552.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1779971 + ... + 1781406.

It is an arithmetic number, because the mean of its divisors is an integer number (480786030).

Almost surely, 2^2557068686 is an apocalyptic number.

2557068686 is a deficient number, since it is larger than the sum of its proper divisors (1289219554).

2557068686 is a wasteful number, since it uses less digits than its factorization.

2557068686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3561738.

The product of its (nonzero) digits is 4838400, while the sum is 53.

The square root of 2557068686 is about 50567.4666757195. The cubic root of 2557068686 is about 1367.4584249643.

The spelling of 2557068686 in words is "two billion, five hundred fifty-seven million, sixty-eight thousand, six hundred eighty-six".