2561057670 has 32 divisors (see below), whose sum is σ = 6148366560. Its totient is φ = 682745600.

The previous prime is 2561057641. The next prime is 2561057677. The reversal of 2561057670 is 767501652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561057677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108970 + ... + 130370.

It is an arithmetic number, because the mean of its divisors is an integer number (192136455).

Almost surely, 2^2561057670 is an apocalyptic number.

2561057670 is an abundant number, since it is smaller than the sum of its proper divisors (3587308890).

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

2561057670 is a wasteful number, since it uses less digits than its factorization.

2561057670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25400.

The product of its (nonzero) digits is 88200, while the sum is 39.

The square root of 2561057670 is about 50606.8935027630. The cubic root of 2561057670 is about 1368.1691262208.

The spelling of 2561057670 in words is "two billion, five hundred sixty-one million, fifty-seven thousand, six hundred seventy".