778240451 has 8 divisors (see below), whose sum is σ = 790306608. Its totient is φ = 766260000.

The previous prime is 778240447. The next prime is 778240469. The reversal of 778240451 is 154042877.

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

It is a cyclic number.

It is not a de Polignac number, because 778240451 - 2² = 778240447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (778240471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3005 + ... + 39566.

It is an arithmetic number, because the mean of its divisors is an integer number (98788326).

Almost surely, 2^778240451 is an apocalyptic number.

778240451 is a deficient number, since it is larger than the sum of its proper divisors (12066157).

778240451 is a wasteful number, since it uses less digits than its factorization.

778240451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42853.

The product of its (nonzero) digits is 62720, while the sum is 38.

The square root of 778240451 is about 27896.9613219791. The cubic root of 778240451 is about 919.8237103143.

The spelling of 778240451 in words is "seven hundred seventy-eight million, two hundred forty thousand, four hundred fifty-one".