2578387967 has 4 divisors (see below), whose sum is σ = 2595463536. Its totient is φ = 2561312400.

The previous prime is 2578387961. The next prime is 2578388051. The reversal of 2578387967 is 7697838752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2578387967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578387961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8537558 + ... + 8537859.

It is an arithmetic number, because the mean of its divisors is an integer number (648865884).

Almost surely, 2^2578387967 is an apocalyptic number.

2578387967 is a deficient number, since it is larger than the sum of its proper divisors (17075569).

2578387967 is a wasteful number, since it uses less digits than its factorization.

2578387967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17075568.

The product of its digits is 35562240, while the sum is 62.

The square root of 2578387967 is about 50777.8294829545. The cubic root of 2578387967 is about 1371.2482570686.

The spelling of 2578387967 in words is "two billion, five hundred seventy-eight million, three hundred eighty-seven thousand, nine hundred sixty-seven".