720762638605 has 16 divisors (see below), whose sum is σ = 871741508400. Its totient is φ = 572068297728.

The previous prime is 720762638599. The next prime is 720762638611. The reversal of 720762638605 is 506836267027.

It is an interprime number because it is at equal distance from previous prime (720762638599) and next prime (720762638611).

It can be written as a sum of positive squares in 8 ways, for example, as 118318112676 + 602444525929 = 343974^2 + 776173^2 .

It is a cyclic number.

It is not a de Polignac number, because 720762638605 - 2³ = 720762638597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68389 + ... + 1202581.

It is an arithmetic number, because the mean of its divisors is an integer number (54483844275).

Almost surely, 2^720762638605 is an apocalyptic number.

It is an amenable number.

720762638605 is a deficient number, since it is larger than the sum of its proper divisors (150978869795).

720762638605 is a wasteful number, since it uses less digits than its factorization.

720762638605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135200.

The product of its (nonzero) digits is 5080320, while the sum is 52.

The spelling of 720762638605 in words is "seven hundred twenty billion, seven hundred sixty-two million, six hundred thirty-eight thousand, six hundred five".