56178012577 has 2 divisors, whose sum is σ = 56178012578. Its totient is φ = 56178012576.

The previous prime is 56178012559. The next prime is 56178012637. The reversal of 56178012577 is 77521087165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31122605056 + 25055407521 = 176416^2 + 158289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56178012577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56178012577.

It is not a weakly prime, because it can be changed into another prime (56178016577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28089006288 + 28089006289.

It is an arithmetic number, because the mean of its divisors is an integer number (28089006289).

Almost surely, 2^56178012577 is an apocalyptic number.

It is an amenable number.

56178012577 is a deficient number, since it is larger than the sum of its proper divisors (1).

56178012577 is an equidigital number, since it uses as much as digits as its factorization.

56178012577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 823200, while the sum is 49.

The spelling of 56178012577 in words is "fifty-six billion, one hundred seventy-eight million, twelve thousand, five hundred seventy-seven".