2557530078 has 32 divisors (see below), whose sum is σ = 5146259712. Its totient is φ = 847324800.

The previous prime is 2557530047. The next prime is 2557530137. The reversal of 2557530078 is 8700357552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 911025 + ... + 913827.

It is an arithmetic number, because the mean of its divisors is an integer number (160820616).

Almost surely, 2^2557530078 is an apocalyptic number.

2557530078 is an abundant number, since it is smaller than the sum of its proper divisors (2588729634).

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

2557530078 is a wasteful number, since it uses less digits than its factorization.

2557530078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3680.

The product of its (nonzero) digits is 294000, while the sum is 42.

The square root of 2557530078 is about 50572.0286126629. The cubic root of 2557530078 is about 1367.5406671083.

The spelling of 2557530078 in words is "two billion, five hundred fifty-seven million, five hundred thirty thousand, seventy-eight".