56778356039 has 4 divisors (see below), whose sum is σ = 56933065824. Its totient is φ = 56623646256.

The previous prime is 56778356023. The next prime is 56778356081. The reversal of 56778356039 is 93065387765.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 56778356039 - 2⁴ = 56778356023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56778356639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77354342 + ... + 77355075.

It is an arithmetic number, because the mean of its divisors is an integer number (14233266456).

Almost surely, 2^56778356039 is an apocalyptic number.

56778356039 is a deficient number, since it is larger than the sum of its proper divisors (154709785).

56778356039 is a wasteful number, since it uses less digits than its factorization.

56778356039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154709784.

The product of its (nonzero) digits is 28576800, while the sum is 59.

The spelling of 56778356039 in words is "fifty-six billion, seven hundred seventy-eight million, three hundred fifty-six thousand, thirty-nine".