774944449478 has 8 divisors (see below), whose sum is σ = 1162438069440. Its totient is φ = 387465093000.

The previous prime is 774944449441. The next prime is 774944449481. The reversal of 774944449478 is 874944449477.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3428993 + ... + 3647996.

It is an arithmetic number, because the mean of its divisors is an integer number (145304758680).

Almost surely, 2^774944449478 is an apocalyptic number.

774944449478 is a deficient number, since it is larger than the sum of its proper divisors (387493619962).

774944449478 is a wasteful number, since it uses less digits than its factorization.

774944449478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7131742.

The product of its digits is 910393344, while the sum is 71.

Subtracting 774944449478 from its reverse (874944449477), we obtain a palindrome (99999999999).

The spelling of 774944449478 in words is "seven hundred seventy-four billion, nine hundred forty-four million, four hundred forty-nine thousand, four hundred seventy-eight".