2605667064 has 128 divisors (see below), whose sum is σ = 8746375680. Its totient is φ = 624729600.

The previous prime is 2605667047. The next prime is 2605667083. The reversal of 2605667064 is 4607665062.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30207 + ... + 78254.

It is an arithmetic number, because the mean of its divisors is an integer number (68331060).

Almost surely, 2^2605667064 is an apocalyptic number.

2605667064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2605667064 is an abundant number, since it is smaller than the sum of its proper divisors (6140708616).

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

2605667064 is a wasteful number, since it uses less digits than its factorization.

2605667064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108501 (or 108497 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 42.

The square root of 2605667064 is about 51045.7350226246. The cubic root of 2605667064 is about 1376.0671937959.

The spelling of 2605667064 in words is "two billion, six hundred five million, six hundred sixty-seven thousand, sixty-four".