2581123670 has 16 divisors (see below), whose sum is σ = 4672881360. Its totient is φ = 1026480864.

The previous prime is 2581123667. The next prime is 2581123673. The reversal of 2581123670 is 763211852.

It is a happy number.

2581123670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2581123667) and next prime (2581123673).

It is a self number, because there is not a number n which added to its sum of digits gives 2581123670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581123673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 744260 + ... + 747719.

It is an arithmetic number, because the mean of its divisors is an integer number (292055085).

Almost surely, 2^2581123670 is an apocalyptic number.

2581123670 is a deficient number, since it is larger than the sum of its proper divisors (2091757690).

2581123670 is a wasteful number, since it uses less digits than its factorization.

2581123670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492159.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 2581123670 is about 50804.7603084593. The cubic root of 2581123670 is about 1371.7330563649.

The spelling of 2581123670 in words is "two billion, five hundred eighty-one million, one hundred twenty-three thousand, six hundred seventy".