726530655647 has 4 divisors (see below), whose sum is σ = 769267753056. Its totient is φ = 683793558240.

The previous prime is 726530655629. The next prime is 726530655649. The reversal of 726530655647 is 746556035627.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746556035627 = 383 ⋅1949232469.

It is a cyclic number.

It is not a de Polignac number, because 726530655647 - 2⁸ = 726530655391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 726530655592 and 726530655601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726530655649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21368548679 + ... + 21368548712.

It is an arithmetic number, because the mean of its divisors is an integer number (192316938264).

Almost surely, 2^726530655647 is an apocalyptic number.

726530655647 is a deficient number, since it is larger than the sum of its proper divisors (42737097409).

726530655647 is a wasteful number, since it uses less digits than its factorization.

726530655647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42737097408.

The product of its (nonzero) digits is 31752000, while the sum is 56.

The spelling of 726530655647 in words is "seven hundred twenty-six billion, five hundred thirty million, six hundred fifty-five thousand, six hundred forty-seven".