720453431636 has 6 divisors (see below), whose sum is σ = 1260793505370. Its totient is φ = 360226715816.

The previous prime is 720453431627. The next prime is 720453431657. The reversal of 720453431636 is 636134354027.

It can be written as a sum of positive squares in only one way, i.e., 453257483536 + 267195948100 = 673244^2 + 516910^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90056678951 + ... + 90056678958.

It is an arithmetic number, because the mean of its divisors is an integer number (210132250895).

Almost surely, 2^720453431636 is an apocalyptic number.

It is an amenable number.

720453431636 is a deficient number, since it is larger than the sum of its proper divisors (540340073734).

720453431636 is a wasteful number, since it uses less digits than its factorization.

720453431636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180113357913 (or 180113357911 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 44.

The spelling of 720453431636 in words is "seven hundred twenty billion, four hundred fifty-three million, four hundred thirty-one thousand, six hundred thirty-six".