501501374107691 has 2 divisors, whose sum is σ = 501501374107692. Its totient is φ = 501501374107690.

The previous prime is 501501374107639. The next prime is 501501374107717. The reversal of 501501374107691 is 196701473105105.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 501501374107691 - 2²⁶ = 501501306998827 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (501501374107291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250750687053845 + 250750687053846.

It is an arithmetic number, because the mean of its divisors is an integer number (250750687053846).

Almost surely, 2^{501501374107691} is an apocalyptic number.

501501374107691 is a deficient number, since it is larger than the sum of its proper divisors (1).

501501374107691 is an equidigital number, since it uses as much as digits as its factorization.

501501374107691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 793800, while the sum is 50.

The spelling of 501501374107691 in words is "five hundred one trillion, five hundred one billion, three hundred seventy-four million, one hundred seven thousand, six hundred ninety-one".