51109323623 has 2 divisors, whose sum is σ = 51109323624. Its totient is φ = 51109323622.

The previous prime is 51109323557. The next prime is 51109323631. The reversal of 51109323623 is 32632390115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51109323623 - 2⁸ = 51109323367 is a prime.

It is a super-2 number, since 2×51109323623² (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 (51109323823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25554661811 + 25554661812.

It is an arithmetic number, because the mean of its divisors is an integer number (25554661812).

Almost surely, 2^51109323623 is an apocalyptic number.

51109323623 is a deficient number, since it is larger than the sum of its proper divisors (1).

51109323623 is an equidigital number, since it uses as much as digits as its factorization.

51109323623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 35.

The spelling of 51109323623 in words is "fifty-one billion, one hundred nine million, three hundred twenty-three thousand, six hundred twenty-three".