2578774557 has 8 divisors (see below), whose sum is σ = 3640622976. Its totient is φ = 1618054592.

The previous prime is 2578774547. The next prime is 2578774571. The reversal of 2578774557 is 7554778752.

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 2578774557 - 2¹⁴ = 2578758173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2578774497 and 2578774506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578774507) 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, 25282053 + ... + 25282154.

It is an arithmetic number, because the mean of its divisors is an integer number (455077872).

Almost surely, 2^2578774557 is an apocalyptic number.

It is an amenable number.

2578774557 is a deficient number, since it is larger than the sum of its proper divisors (1061848419).

2578774557 is a wasteful number, since it uses less digits than its factorization.

2578774557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50564227.

The product of its digits is 19208000, while the sum is 57.

The square root of 2578774557 is about 50781.6360213020. The cubic root of 2578774557 is about 1371.3167862399.

The spelling of 2578774557 in words is "two billion, five hundred seventy-eight million, seven hundred seventy-four thousand, five hundred fifty-seven".