772668128724241 has 4 divisors (see below), whose sum is σ = 779505899775012. Its totient is φ = 765830357673472.

The previous prime is 772668128724227. The next prime is 772668128724251. The reversal of 772668128724241 is 142427821866277.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53491377888400 + 719176750835841 = 7313780^2 + 26817471^2 .

It is a cyclic number.

It is not a de Polignac number, because 772668128724241 - 2⁵ = 772668128724209 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (772668128724251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3418885525216 + ... + 3418885525441.

It is an arithmetic number, because the mean of its divisors is an integer number (194876474943753).

Almost surely, 2^{772668128724241} is an apocalyptic number.

It is an amenable number.

772668128724241 is a deficient number, since it is larger than the sum of its proper divisors (6837771050771).

772668128724241 is a wasteful number, since it uses less digits than its factorization.

772668128724241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6837771050770.

The product of its digits is 202309632, while the sum is 67.

The spelling of 772668128724241 in words is "seven hundred seventy-two trillion, six hundred sixty-eight billion, one hundred twenty-eight million, seven hundred twenty-four thousand, two hundred forty-one".