2506866378205 has 64 divisors (see below), whose sum is σ = 3697892352000. Its totient is φ = 1593026638848.

The previous prime is 2506866378197. The next prime is 2506866378217. The reversal of 2506866378205 is 5028736686052.

It is a cyclic number.

It is not a de Polignac number, because 2506866378205 - 2³ = 2506866378197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2506866378205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 61833381 + ... + 61873909.

It is an arithmetic number, because the mean of its divisors is an integer number (57779568000).

Almost surely, 2^{2506866378205} is an apocalyptic number.

It is an amenable number.

2506866378205 is a deficient number, since it is larger than the sum of its proper divisors (1191025973795).

2506866378205 is a wasteful number, since it uses less digits than its factorization.

2506866378205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42586.

The product of its (nonzero) digits is 29030400, while the sum is 58.

The spelling of 2506866378205 in words is "two trillion, five hundred six billion, eight hundred sixty-six million, three hundred seventy-eight thousand, two hundred five".