778346481 has 16 divisors (see below), whose sum is σ = 1168662528. Its totient is φ = 456507600.

The previous prime is 778346449. The next prime is 778346509. The reversal of 778346481 is 184643877.

It is not a de Polignac number, because 778346481 - 2⁵ = 778346449 is a prime.

It is a super-2 number, since 2×778346481² = 1211646488970166722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 778346481.

It is not an unprimeable number, because it can be changed into a prime (778346441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379401 + ... + 381446.

It is an arithmetic number, because the mean of its divisors is an integer number (73041408).

Almost surely, 2^778346481 is an apocalyptic number.

It is an amenable number.

778346481 is a deficient number, since it is larger than the sum of its proper divisors (390316047).

778346481 is a wasteful number, since it uses less digits than its factorization.

778346481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760892.

The product of its digits is 903168, while the sum is 48.

The square root of 778346481 is about 27898.8616434434. The cubic root of 778346481 is about 919.8654816713.

The spelling of 778346481 in words is "seven hundred seventy-eight million, three hundred forty-six thousand, four hundred eighty-one".