51065633623 has 2 divisors, whose sum is σ = 51065633624. Its totient is φ = 51065633622.

The previous prime is 51065633543. The next prime is 51065633639. The reversal of 51065633623 is 32633656015.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51065633623 - 2⁹ = 51065633111 is a prime.

It is a super-2 number, since 2×51065633623² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51065633693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25532816811 + 25532816812.

It is an arithmetic number, because the mean of its divisors is an integer number (25532816812).

Almost surely, 2^51065633623 is an apocalyptic number.

51065633623 is a deficient number, since it is larger than the sum of its proper divisors (1).

51065633623 is an equidigital number, since it uses as much as digits as its factorization.

51065633623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 40.

The spelling of 51065633623 in words is "fifty-one billion, sixty-five million, six hundred thirty-three thousand, six hundred twenty-three".