250947950639 has 2 divisors, whose sum is σ = 250947950640. Its totient is φ = 250947950638.

The previous prime is 250947950609. The next prime is 250947950647. The reversal of 250947950639 is 936059749052.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-250947950639 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250947950609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125473975319 + 125473975320.

It is an arithmetic number, because the mean of its divisors is an integer number (125473975320).

Almost surely, 2^250947950639 is an apocalyptic number.

250947950639 is a deficient number, since it is larger than the sum of its proper divisors (1).

250947950639 is an equidigital number, since it uses as much as digits as its factorization.

250947950639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18370800, while the sum is 59.

The spelling of 250947950639 in words is "two hundred fifty billion, nine hundred forty-seven million, nine hundred fifty thousand, six hundred thirty-nine".