764612505505 has 8 divisors (see below), whose sum is σ = 917761191912. Its totient is φ = 611539214208.

The previous prime is 764612505467. The next prime is 764612505551. The reversal of 764612505505 is 505505216467.

764612505505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1587544336 + 763024961169 = 39844^2 + 873513^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 764612505505 - 2⁹ = 764612504993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18826462 + ... + 18867031.

It is an arithmetic number, because the mean of its divisors is an integer number (114720148989).

Almost surely, 2^764612505505 is an apocalyptic number.

It is an amenable number.

764612505505 is a deficient number, since it is larger than the sum of its proper divisors (153148686407).

764612505505 is a wasteful number, since it uses less digits than its factorization.

764612505505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37697555.

The product of its (nonzero) digits is 1260000, while the sum is 46.

The spelling of 764612505505 in words is "seven hundred sixty-four billion, six hundred twelve million, five hundred five thousand, five hundred five".