722563076978 has 6 divisors (see below), whose sum is σ = 1083846418671. Its totient is φ = 361280937422.

The previous prime is 722563076957. The next prime is 722563076981. The reversal of 722563076978 is 879670365227.

It can be written as a sum of positive squares in only one way, i.e., 361281538489 + 361281538489 = 601067^2 + 601067^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=601067.

It is a super-2 number, since 2×722563076978² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 722563076978.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 901601 + ... + 1502667.

Almost surely, 2^722563076978 is an apocalyptic number.

722563076978 is a deficient number, since it is larger than the sum of its proper divisors (361283341693).

722563076978 is an frugal number, since it uses more digits than its factorization.

722563076978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202136 (or 601069 counting only the distinct ones).

The product of its (nonzero) digits is 53343360, while the sum is 62.

The spelling of 722563076978 in words is "seven hundred twenty-two billion, five hundred sixty-three million, seventy-six thousand, nine hundred seventy-eight".