249631606445887 has 2 divisors, whose sum is σ = 249631606445888. Its totient is φ = 249631606445886.

The previous prime is 249631606445857. The next prime is 249631606446023. The reversal of 249631606445887 is 788544606136942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249631606445887 - 2²³ = 249631598057279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249631606445857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124815803222943 + 124815803222944.

It is an arithmetic number, because the mean of its divisors is an integer number (124815803222944).

It is a 1-persistent number, because it is pandigital, but 2⋅249631606445887 = 499263212891774 is not.

Almost surely, 2^{249631606445887} is an apocalyptic number.

249631606445887 is a deficient number, since it is larger than the sum of its proper divisors (1).

249631606445887 is an equidigital number, since it uses as much as digits as its factorization.

249631606445887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1672151040, while the sum is 73.

The spelling of 249631606445887 in words is "two hundred forty-nine trillion, six hundred thirty-one billion, six hundred six million, four hundred forty-five thousand, eight hundred eighty-seven".