726712544640 has 128 divisors (see below), whose sum is σ = 2316644114400. Its totient is φ = 193769275392.

The previous prime is 726712544629. The next prime is 726712544669. The reversal of 726712544640 is 46445217627.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×726712544640² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 726712544640.

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, 28074744 + ... + 28100616.

Almost surely, 2^726712544640 is an apocalyptic number.

It is an amenable number.

726712544640 is an abundant number, since it is smaller than the sum of its proper divisors (1589931569760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

726712544640 is a wasteful number, since it uses less digits than its factorization.

726712544640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40524 (or 40512 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 48.

The spelling of 726712544640 in words is "seven hundred twenty-six billion, seven hundred twelve million, five hundred forty-four thousand, six hundred forty".