56780057 has 8 divisors (see below), whose sum is σ = 59544840. Its totient is φ = 54069120.

The previous prime is 56780047. The next prime is 56780063. The reversal of 56780057 is 75008765.

It can be written as a sum of positive squares in 4 ways, for example, as 20647936 + 36132121 = 4544^2 + 6011^2 .

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 56780057 - 2⁶ = 56779993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56780057.

It is not an unprimeable number, because it can be changed into a prime (56780027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11294 + ... + 15527.

It is an arithmetic number, because the mean of its divisors is an integer number (7443105).

Almost surely, 2^56780057 is an apocalyptic number.

It is an amenable number.

56780057 is a deficient number, since it is larger than the sum of its proper divisors (2764783).

56780057 is a wasteful number, since it uses less digits than its factorization.

56780057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26923.

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 56780057 is about 7535.2542757362. The cubic root of 56780057 is about 384.3544745644.

The spelling of 56780057 in words is "fifty-six million, seven hundred eighty thousand, fifty-seven".