56556378077 has 4 divisors (see below), whose sum is σ = 56694658140. Its totient is φ = 56418098016.

The previous prime is 56556378059. The next prime is 56556378089. The reversal of 56556378077 is 77087365565.

It is a happy number.

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 36274630681 + 20281747396 = 190459^2 + 142414^2 .

It is a cyclic number.

It is not a de Polignac number, because 56556378077 - 2¹² = 56556373981 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 (56556378877) 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, 69139418 + ... + 69140235.

It is an arithmetic number, because the mean of its divisors is an integer number (14173664535).

Almost surely, 2^56556378077 is an apocalyptic number.

It is an amenable number.

56556378077 is a deficient number, since it is larger than the sum of its proper divisors (138280063).

56556378077 is a wasteful number, since it uses less digits than its factorization.

56556378077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138280062.

The product of its (nonzero) digits is 37044000, while the sum is 59.

The spelling of 56556378077 in words is "fifty-six billion, five hundred fifty-six million, three hundred seventy-eight thousand, seventy-seven".