772947851644 has 24 divisors (see below), whose sum is σ = 1427249577600. Its totient is φ = 365259351600.

The previous prime is 772947851639. The next prime is 772947851647. The reversal of 772947851644 is 446158749277.

It is a super-2 number, since 2×772947851644² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772947851647) 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, 12104632 + ... + 12168319.

It is an arithmetic number, because the mean of its divisors is an integer number (59468732400).

Almost surely, 2^772947851644 is an apocalyptic number.

It is an amenable number.

772947851644 is a deficient number, since it is larger than the sum of its proper divisors (654301725956).

772947851644 is a wasteful number, since it uses less digits than its factorization.

772947851644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24273393 (or 24273391 counting only the distinct ones).

The product of its digits is 94832640, while the sum is 64.

The spelling of 772947851644 in words is "seven hundred seventy-two billion, nine hundred forty-seven million, eight hundred fifty-one thousand, six hundred forty-four".