2578118387 has 8 divisors (see below), whose sum is σ = 2788888704. Its totient is φ = 2369127168.

The previous prime is 2578118359. The next prime is 2578118419. The reversal of 2578118387 is 7838118752.

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 2578118387 - 2¹² = 2578114291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2578112387) 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, 441758 + ... + 447555.

It is an arithmetic number, because the mean of its divisors is an integer number (348611088).

Almost surely, 2^2578118387 is an apocalyptic number.

2578118387 is a deficient number, since it is larger than the sum of its proper divisors (210770317).

2578118387 is a wasteful number, since it uses less digits than its factorization.

2578118387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889549.

The product of its digits is 752640, while the sum is 50.

The square root of 2578118387 is about 50775.1749086106. The cubic root of 2578118387 is about 1371.2004657104.

The spelling of 2578118387 in words is "two billion, five hundred seventy-eight million, one hundred eighteen thousand, three hundred eighty-seven".