51571775623 has 2 divisors, whose sum is σ = 51571775624. Its totient is φ = 51571775622.

The previous prime is 51571775477. The next prime is 51571775657. The reversal of 51571775623 is 32657717515.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51571775623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51571775683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25785887811 + 25785887812.

It is an arithmetic number, because the mean of its divisors is an integer number (25785887812).

Almost surely, 2^51571775623 is an apocalyptic number.

51571775623 is a deficient number, since it is larger than the sum of its proper divisors (1).

51571775623 is an equidigital number, since it uses as much as digits as its factorization.

51571775623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1543500, while the sum is 49.

The spelling of 51571775623 in words is "fifty-one billion, five hundred seventy-one million, seven hundred seventy-five thousand, six hundred twenty-three".