25556651167 has 2 divisors, whose sum is σ = 25556651168. Its totient is φ = 25556651166.

The previous prime is 25556651147. The next prime is 25556651209. The reversal of 25556651167 is 76115665552.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25556651167 - 2¹¹ = 25556649119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25556651167.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25556651117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12778325583 + 12778325584.

It is an arithmetic number, because the mean of its divisors is an integer number (12778325584).

Almost surely, 2^25556651167 is an apocalyptic number.

25556651167 is a deficient number, since it is larger than the sum of its proper divisors (1).

25556651167 is an equidigital number, since it uses as much as digits as its factorization.

25556651167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890000, while the sum is 49.

The spelling of 25556651167 in words is "twenty-five billion, five hundred fifty-six million, six hundred fifty-one thousand, one hundred sixty-seven".