2557780812 has 36 divisors (see below), whose sum is σ = 6467520696. Its totient is φ = 852327360.

The previous prime is 2557780801. The next prime is 2557780853. The reversal of 2557780812 is 2180877552.

2557780812 is a `hidden beast` number, since 2 + 557 + 7 + 80 + 8 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130563 + ... + 148869.

Almost surely, 2^2557780812 is an apocalyptic number.

It is an amenable number.

2557780812 is an abundant number, since it is smaller than the sum of its proper divisors (3909739884).

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

2557780812 is a wasteful number, since it uses less digits than its factorization.

2557780812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22198 (or 22193 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 45.

The square root of 2557780812 is about 50574.5075309686. The cubic root of 2557780812 is about 1367.5853557632.

The spelling of 2557780812 in words is "two billion, five hundred fifty-seven million, seven hundred eighty thousand, eight hundred twelve".