772744646561 has 8 divisors (see below), whose sum is σ = 777299967360. Its totient is φ = 768200343568.

The previous prime is 772744646551. The next prime is 772744646581. The reversal of 772744646561 is 165646447277.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-772744646561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 772744646561.

It is not an unprimeable number, because it can be changed into a prime (772744646551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2613746 + ... + 2894331.

It is an arithmetic number, because the mean of its divisors is an integer number (97162495920).

Almost surely, 2^772744646561 is an apocalyptic number.

It is an amenable number.

772744646561 is a deficient number, since it is larger than the sum of its proper divisors (4555320799).

772744646561 is a wasteful number, since it uses less digits than its factorization.

772744646561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5508903.

The product of its digits is 47416320, while the sum is 59.

The spelling of 772744646561 in words is "seven hundred seventy-two billion, seven hundred forty-four million, six hundred forty-six thousand, five hundred sixty-one".