2578771456 has 40 divisors (see below), whose sum is σ = 5318748864. Its totient is φ = 1247784960.

The previous prime is 2578771453. The next prime is 2578771471. The reversal of 2578771456 is 6541778752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578771453) 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, 65365 + ... + 97108.

Almost surely, 2^2578771456 is an apocalyptic number.

It is an amenable number.

2578771456 is an abundant number, since it is smaller than the sum of its proper divisors (2739977408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2578771456 is an equidigital number, since it uses as much as digits as its factorization.

2578771456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162522 (or 162506 counting only the distinct ones).

The product of its digits is 3292800, while the sum is 52.

The square root of 2578771456 is about 50781.6054886019. The cubic root of 2578771456 is about 1371.3162365660.

The spelling of 2578771456 in words is "two billion, five hundred seventy-eight million, seven hundred seventy-one thousand, four hundred fifty-six".