778259311342 has 4 divisors (see below), whose sum is σ = 1167388967016. Its totient is φ = 389129655670.

The previous prime is 778259311327. The next prime is 778259311351. The reversal of 778259311342 is 243113952877.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 778259311342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194564827834 + ... + 194564827837.

It is an arithmetic number, because the mean of its divisors is an integer number (291847241754).

Almost surely, 2^778259311342 is an apocalyptic number.

778259311342 is a deficient number, since it is larger than the sum of its proper divisors (389129655674).

778259311342 is a wasteful number, since it uses less digits than its factorization.

778259311342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389129655673.

The product of its digits is 2540160, while the sum is 52.

The spelling of 778259311342 in words is "seven hundred seventy-eight billion, two hundred fifty-nine million, three hundred eleven thousand, three hundred forty-two".