9098726761561 has 8 divisors (see below), whose sum is σ = 9212628628584. Its totient is φ = 8985513123840.

The previous prime is 9098726761547. The next prime is 9098726761591. The reversal of 9098726761561 is 1651676278909.

It can be written as a sum of positive squares in 4 ways, for example, as 1320936462400 + 7777790299161 = 1149320^2 + 2788869^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9098726761561 - 2²⁵ = 9098693207129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9098726761591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172030720 + ... + 172083601.

It is an arithmetic number, because the mean of its divisors is an integer number (1151578578573).

Almost surely, 2^{9098726761561} is an apocalyptic number.

It is an amenable number.

9098726761561 is a deficient number, since it is larger than the sum of its proper divisors (113901867023).

9098726761561 is a wasteful number, since it uses less digits than its factorization.

9098726761561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344114651.

The product of its (nonzero) digits is 68584320, while the sum is 67.

The spelling of 9098726761561 in words is "nine trillion, ninety-eight billion, seven hundred twenty-six million, seven hundred sixty-one thousand, five hundred sixty-one".