7801088399947 has 2 divisors, whose sum is σ = 7801088399948. Its totient is φ = 7801088399946.

The previous prime is 7801088399879. The next prime is 7801088400037. The reversal of 7801088399947 is 7499938801087.

It is a weak prime.

It is an emirp because it is prime and its reverse (7499938801087) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7801088399947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7801088399947.

It is not a weakly prime, because it can be changed into another prime (7801088399347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3900544199973 + 3900544199974.

It is an arithmetic number, because the mean of its divisors is an integer number (3900544199974).

Almost surely, 2^{7801088399947} is an apocalyptic number.

7801088399947 is a deficient number, since it is larger than the sum of its proper divisors (1).

7801088399947 is an equidigital number, since it uses as much as digits as its factorization.

7801088399947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 219469824, while the sum is 73.

The spelling of 7801088399947 in words is "seven trillion, eight hundred one billion, eighty-eight million, three hundred ninety-nine thousand, nine hundred forty-seven".