56778245 has 4 divisors (see below), whose sum is σ = 68133900. Its totient is φ = 45422592.

The previous prime is 56778223. The next prime is 56778247. The reversal of 56778245 is 54287765.

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

It can be written as a sum of positive squares in 2 ways, for example, as 41770369 + 15007876 = 6463^2 + 3874^2 .

It is a cyclic number.

It is not a de Polignac number, because 56778245 - 2¹² = 56774149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56778196 and 56778205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56778247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5677820 + ... + 5677829.

It is an arithmetic number, because the mean of its divisors is an integer number (17033475).

Almost surely, 2^56778245 is an apocalyptic number.

It is an amenable number.

56778245 is a deficient number, since it is larger than the sum of its proper divisors (11355655).

56778245 is a wasteful number, since it uses less digits than its factorization.

56778245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11355654.

The product of its digits is 470400, while the sum is 44.

The square root of 56778245 is about 7535.1340399491. The cubic root of 56778245 is about 384.3503859357.

The spelling of 56778245 in words is "fifty-six million, seven hundred seventy-eight thousand, two hundred forty-five".