2581640052 has 24 divisors (see below), whose sum is σ = 6100080000. Its totient is φ = 849653376.

The previous prime is 2581640027. The next prime is 2581640053. The reversal of 2581640052 is 2500461852.

2581640052 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2581639995 and 2581640022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581640053) 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, 1360677 + ... + 1362572.

It is an arithmetic number, because the mean of its divisors is an integer number (254170000).

Almost surely, 2^2581640052 is an apocalyptic number.

It is an amenable number.

2581640052 is an abundant number, since it is smaller than the sum of its proper divisors (3518439948).

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

2581640052 is a wasteful number, since it uses less digits than its factorization.

2581640052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723335 (or 2723333 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 2581640052 is about 50809.8420780856. The cubic root of 2581640052 is about 1371.8245269953.

The spelling of 2581640052 in words is "two billion, five hundred eighty-one million, six hundred forty thousand, fifty-two".