56371445777 has 2 divisors, whose sum is σ = 56371445778. Its totient is φ = 56371445776.

The previous prime is 56371445731. The next prime is 56371445791. The reversal of 56371445777 is 77754417365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52168387216 + 4203058561 = 228404^2 + 64831^2 .

It is a cyclic number.

It is not a de Polignac number, because 56371445777 - 2¹⁸ = 56371183633 is a prime.

It is a super-2 number, since 2×56371445777² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56371445707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28185722888 + 28185722889.

It is an arithmetic number, because the mean of its divisors is an integer number (28185722889).

Almost surely, 2^56371445777 is an apocalyptic number.

It is an amenable number.

56371445777 is a deficient number, since it is larger than the sum of its proper divisors (1).

56371445777 is an equidigital number, since it uses as much as digits as its factorization.

56371445777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17287200, while the sum is 56.

The spelling of 56371445777 in words is "fifty-six billion, three hundred seventy-one million, four hundred forty-five thousand, seven hundred seventy-seven".