205251026715 has 48 divisors (see below), whose sum is σ = 408383808768. Its totient is φ = 93415664448.

The previous prime is 205251026711. The next prime is 205251026819. The reversal of 205251026715 is 517620152502.

205251026715 is a `hidden beast` number, since 2 + 0 + 52 + 510 + 26 + 71 + 5 = 666.

It is not a de Polignac number, because 205251026715 - 2² = 205251026711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205251026715.

It is not an unprimeable number, because it can be changed into a prime (205251026711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1363717 + ... + 1506726.

It is an arithmetic number, because the mean of its divisors is an integer number (8507996016).

Almost surely, 2^205251026715 is an apocalyptic number.

205251026715 is a deficient number, since it is larger than the sum of its proper divisors (203132782053).

205251026715 is a wasteful number, since it uses less digits than its factorization.

205251026715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870688 (or 2870685 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The spelling of 205251026715 in words is "two hundred five billion, two hundred fifty-one million, twenty-six thousand, seven hundred fifteen".