56109778 has 4 divisors (see below), whose sum is σ = 84164670. Its totient is φ = 28054888.

The previous prime is 56109773. The next prime is 56109787. The reversal of 56109778 is 87790165.

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

It can be written as a sum of positive squares in only one way, i.e., 33953929 + 22155849 = 5827^2 + 4707^2 .

It is not an unprimeable number, because it can be changed into a prime (56109773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14027443 + ... + 14027446.

Almost surely, 2^56109778 is an apocalyptic number.

56109778 is a deficient number, since it is larger than the sum of its proper divisors (28054892).

56109778 is a wasteful number, since it uses less digits than its factorization.

56109778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28054891.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 56109778 is about 7490.6460335541. The cubic root of 56109778 is about 382.8360707064.

The spelling of 56109778 in words is "fifty-six million, one hundred nine thousand, seven hundred seventy-eight".