51207178835623 has 2 divisors, whose sum is σ = 51207178835624. Its totient is φ = 51207178835622.

The previous prime is 51207178835611. The next prime is 51207178835737. The reversal of 51207178835623 is 32653887170215.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51207178835623 is a prime.

It is a super-2 number, since 2×51207178835623² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51207178875623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25603589417811 + 25603589417812.

It is an arithmetic number, because the mean of its divisors is an integer number (25603589417812).

Almost surely, 2^{51207178835623} is an apocalyptic number.

51207178835623 is a deficient number, since it is larger than the sum of its proper divisors (1).

51207178835623 is an equidigital number, since it uses as much as digits as its factorization.

51207178835623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16934400, while the sum is 58.

The spelling of 51207178835623 in words is "fifty-one trillion, two hundred seven billion, one hundred seventy-eight million, eight hundred thirty-five thousand, six hundred twenty-three".