2573778440 has 32 divisors (see below), whose sum is σ = 5820120000. Its totient is φ = 1024334784.

The previous prime is 2573778439. The next prime is 2573778479. The reversal of 2573778440 is 448773752.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153710 + ... + 169629.

It is an arithmetic number, because the mean of its divisors is an integer number (181878750).

Almost surely, 2^2573778440 is an apocalyptic number.

2573778440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2573778440 is an abundant number, since it is smaller than the sum of its proper divisors (3246341560).

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

2573778440 is a wasteful number, since it uses less digits than its factorization.

2573778440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323549 (or 323545 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 47.

The square root of 2573778440 is about 50732.4200092998. The cubic root of 2573778440 is about 1370.4306174716.

The spelling of 2573778440 in words is "two billion, five hundred seventy-three million, seven hundred seventy-eight thousand, four hundred forty".