56780105 has 4 divisors (see below), whose sum is σ = 68136132. Its totient is φ = 45424080.

The previous prime is 56780093. The next prime is 56780107. The reversal of 56780105 is 50108765.

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 30780304 + 25999801 = 5548^2 + 5099^2 .

It is not a de Polignac number, because 56780105 - 2¹⁸ = 56517961 is a prime.

It is a super-2 number, since 2×56780105² = 6447960647622050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56780107) 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, 5678006 + ... + 5678015.

It is an arithmetic number, because the mean of its divisors is an integer number (17034033).

Almost surely, 2^56780105 is an apocalyptic number.

It is an amenable number.

56780105 is a deficient number, since it is larger than the sum of its proper divisors (11356027).

56780105 is a wasteful number, since it uses less digits than its factorization.

56780105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11356026.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 56780105 is about 7535.2574607640. The cubic root of 56780105 is about 384.3545828713.

The spelling of 56780105 in words is "fifty-six million, seven hundred eighty thousand, one hundred five".