51501925807 has 2 divisors, whose sum is σ = 51501925808. Its totient is φ = 51501925806.

The previous prime is 51501925801. The next prime is 51501925837. The reversal of 51501925807 is 70852910515.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51501925807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51501925801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25750962903 + 25750962904.

It is an arithmetic number, because the mean of its divisors is an integer number (25750962904).

Almost surely, 2^51501925807 is an apocalyptic number.

51501925807 is a deficient number, since it is larger than the sum of its proper divisors (1).

51501925807 is an equidigital number, since it uses as much as digits as its factorization.

51501925807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126000, while the sum is 43.

The spelling of 51501925807 in words is "fifty-one billion, five hundred one million, nine hundred twenty-five thousand, eight hundred seven".