7855494047 has 2 divisors, whose sum is σ = 7855494048. Its totient is φ = 7855494046.

The previous prime is 7855494043. The next prime is 7855494061. The reversal of 7855494047 is 7404945587.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7855494047 - 2² = 7855494043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7855494047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7855494043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3927747023 + 3927747024.

It is an arithmetic number, because the mean of its divisors is an integer number (3927747024).

Almost surely, 2^7855494047 is an apocalyptic number.

7855494047 is a deficient number, since it is larger than the sum of its proper divisors (1).

7855494047 is an equidigital number, since it uses as much as digits as its factorization.

7855494047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5644800, while the sum is 53.

The square root of 7855494047 is about 88631.2250112792. The cubic root of 7855494047 is about 1987.8845939124.

The spelling of 7855494047 in words is "seven billion, eight hundred fifty-five million, four hundred ninety-four thousand, forty-seven".