1173272705661 has 8 divisors (see below), whose sum is σ = 1787844122944. Its totient is φ = 670441546080.

The previous prime is 1173272705569. The next prime is 1173272705681. The reversal of 1173272705661 is 1665072723711.

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

It is not a de Polignac number, because 1173272705661 - 2⁹ = 1173272705149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1173272705661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1173272705681) 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, 27935064400 + ... + 27935064441.

It is an arithmetic number, because the mean of its divisors is an integer number (223480515368).

Almost surely, 2^{1173272705661} is an apocalyptic number.

It is an amenable number.

1173272705661 is a deficient number, since it is larger than the sum of its proper divisors (614571417283).

1173272705661 is an equidigital number, since it uses as much as digits as its factorization.

1173272705661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55870128851.

The product of its (nonzero) digits is 740880, while the sum is 48.

The spelling of 1173272705661 in words is "one trillion, one hundred seventy-three billion, two hundred seventy-two million, seven hundred five thousand, six hundred sixty-one".