726242607577 has 4 divisors (see below), whose sum is σ = 739945298340. Its totient is φ = 712539916816.

The previous prime is 726242607553. The next prime is 726242607589. The reversal of 726242607577 is 775706242627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 352623380041 + 373619227536 = 593821^2 + 611244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726242607577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726242607677) 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, 6851345302 + ... + 6851345407.

It is an arithmetic number, because the mean of its divisors is an integer number (184986324585).

Almost surely, 2^726242607577 is an apocalyptic number.

It is an amenable number.

726242607577 is a deficient number, since it is larger than the sum of its proper divisors (13702690763).

726242607577 is a wasteful number, since it uses less digits than its factorization.

726242607577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13702690762.

The product of its (nonzero) digits is 13829760, while the sum is 55.

The spelling of 726242607577 in words is "seven hundred twenty-six billion, two hundred forty-two million, six hundred seven thousand, five hundred seventy-seven".