501216320777 has 2 divisors, whose sum is σ = 501216320778. Its totient is φ = 501216320776.

The previous prime is 501216320771. The next prime is 501216320791. The reversal of 501216320777 is 777023612105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328402348096 + 172813972681 = 573064^2 + 415709^2 .

It is a cyclic number.

It is not a de Polignac number, because 501216320777 - 2¹⁰ = 501216319753 is a prime.

It is not a weakly prime, because it can be changed into another prime (501216320771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250608160388 + 250608160389.

It is an arithmetic number, because the mean of its divisors is an integer number (250608160389).

Almost surely, 2^501216320777 is an apocalyptic number.

It is an amenable number.

501216320777 is a deficient number, since it is larger than the sum of its proper divisors (1).

501216320777 is an equidigital number, since it uses as much as digits as its factorization.

501216320777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123480, while the sum is 41.

The spelling of 501216320777 in words is "five hundred one billion, two hundred sixteen million, three hundred twenty thousand, seven hundred seventy-seven".