56503939477 has 2 divisors, whose sum is σ = 56503939478. Its totient is φ = 56503939476.

The previous prime is 56503939439. The next prime is 56503939489. The reversal of 56503939477 is 77493930565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38764096996 + 17739842481 = 196886^2 + 133191^2 .

It is a cyclic number.

It is not a de Polignac number, because 56503939477 - 2¹⁵ = 56503906709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56503939417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28251969738 + 28251969739.

It is an arithmetic number, because the mean of its divisors is an integer number (28251969739).

Almost surely, 2^56503939477 is an apocalyptic number.

It is an amenable number.

56503939477 is a deficient number, since it is larger than the sum of its proper divisors (1).

56503939477 is an equidigital number, since it uses as much as digits as its factorization.

56503939477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21432600, while the sum is 58.

The spelling of 56503939477 in words is "fifty-six billion, five hundred three million, nine hundred thirty-nine thousand, four hundred seventy-seven".