2557065546 has 144 divisors (see below), whose sum is σ = 6685099200. Its totient is φ = 691746048.

The previous prime is 2557065529. The next prime is 2557065569. The reversal of 2557065546 is 6455607552.

2557065546 is a `hidden beast` number, since 2 + 557 + 0 + 6 + 55 + 46 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6251790 + ... + 6252198.

It is an arithmetic number, because the mean of its divisors is an integer number (46424300).

Almost surely, 2^2557065546 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2557065546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3342549600).

2557065546 is an abundant number, since it is smaller than the sum of its proper divisors (4128033654).

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

2557065546 is a wasteful number, since it uses less digits than its factorization.

2557065546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 1260000, while the sum is 45.

The square root of 2557065546 is about 50567.4356280799. The cubic root of 2557065546 is about 1367.4578652321.

The spelling of 2557065546 in words is "two billion, five hundred fifty-seven million, sixty-five thousand, five hundred forty-six".