778352445 has 48 divisors (see below), whose sum is σ = 1458737280. Its totient is φ = 381656448.

The previous prime is 778352441. The next prime is 778352447. The reversal of 778352445 is 544253877.

778352445 is a `hidden beast` number, since 7 + 7 + 83 + 524 + 45 = 666.

It is not a de Polignac number, because 778352445 - 2² = 778352441 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 778352445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778352441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 151326 + ... + 156384.

It is an arithmetic number, because the mean of its divisors is an integer number (30390360).

Almost surely, 2^778352445 is an apocalyptic number.

It is an amenable number.

778352445 is a deficient number, since it is larger than the sum of its proper divisors (680384835).

778352445 is a wasteful number, since it uses less digits than its factorization.

778352445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5346 (or 5343 counting only the distinct ones).

The product of its digits is 940800, while the sum is 45.

The square root of 778352445 is about 27898.9685293202. The cubic root of 778352445 is about 919.8678311236.

The spelling of 778352445 in words is "seven hundred seventy-eight million, three hundred fifty-two thousand, four hundred forty-five".