2578327557 has 16 divisors (see below), whose sum is σ = 3703421568. Its totient is φ = 1586145600.

The previous prime is 2578327547. The next prime is 2578327637. The reversal of 2578327557 is 7557238752.

It is not a de Polignac number, because 2578327557 - 2¹¹ = 2578325509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578327547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135408 + ... + 153270.

It is an arithmetic number, because the mean of its divisors is an integer number (231463848).

Almost surely, 2^2578327557 is an apocalyptic number.

It is an amenable number.

2578327557 is a deficient number, since it is larger than the sum of its proper divisors (1125094011).

2578327557 is a wasteful number, since it uses less digits than its factorization.

2578327557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21580.

The product of its digits is 4116000, while the sum is 51.

The square root of 2578327557 is about 50777.2346332488. The cubic root of 2578327557 is about 1371.2375478250.

The spelling of 2578327557 in words is "two billion, five hundred seventy-eight million, three hundred twenty-seven thousand, five hundred fifty-seven".