34478256551 has 2 divisors, whose sum is σ = 34478256552. Its totient is φ = 34478256550.

The previous prime is 34478256521. The next prime is 34478256583. The reversal of 34478256551 is 15565287443.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34478256551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 34478256551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34478256521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17239128275 + 17239128276.

It is an arithmetic number, because the mean of its divisors is an integer number (17239128276).

Almost surely, 2^34478256551 is an apocalyptic number.

34478256551 is a deficient number, since it is larger than the sum of its proper divisors (1).

34478256551 is an equidigital number, since it uses as much as digits as its factorization.

34478256551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032000, while the sum is 50.

The spelling of 34478256551 in words is "thirty-four billion, four hundred seventy-eight million, two hundred fifty-six thousand, five hundred fifty-one".