726125421161 has 4 divisors (see below), whose sum is σ = 829857624192. Its totient is φ = 622393218132.

The previous prime is 726125421149. The next prime is 726125421223. The reversal of 726125421161 is 161124521627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 726125421161 - 2³⁸ = 451247514217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726125421101) 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, 51866101505 + ... + 51866101518.

It is an arithmetic number, because the mean of its divisors is an integer number (207464406048).

Almost surely, 2^726125421161 is an apocalyptic number.

It is an amenable number.

726125421161 is a deficient number, since it is larger than the sum of its proper divisors (103732203031).

726125421161 is a wasteful number, since it uses less digits than its factorization.

726125421161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103732203030.

The product of its digits is 40320, while the sum is 38.

Adding to 726125421161 its reverse (161124521627), we get a palindrome (887249942788).

The spelling of 726125421161 in words is "seven hundred twenty-six billion, one hundred twenty-five million, four hundred twenty-one thousand, one hundred sixty-one".