720631012636 has 12 divisors (see below), whose sum is σ = 1262199939840. Its totient is φ = 360002458400.

The previous prime is 720631012613. The next prime is 720631012691. The reversal of 720631012636 is 636210136027.

It is a junction number, because it is equal to n+sod(n) for n = 720631012595 and 720631012604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78256801 + ... + 78266008.

It is an arithmetic number, because the mean of its divisors is an integer number (105183328320).

Almost surely, 2^720631012636 is an apocalyptic number.

It is an amenable number.

720631012636 is a deficient number, since it is larger than the sum of its proper divisors (541568927204).

720631012636 is a wasteful number, since it uses less digits than its factorization.

720631012636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156523964 (or 156523962 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The spelling of 720631012636 in words is "seven hundred twenty billion, six hundred thirty-one million, twelve thousand, six hundred thirty-six".