13072173375461 has 4 divisors (see below), whose sum is σ = 13251244243692. Its totient is φ = 12893102507232.

The previous prime is 13072173375409. The next prime is 13072173375523. The reversal of 13072173375461 is 16457337127031.

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 7306263060100 + 5765910315361 = 2703010^2 + 2401231^2 .

It is a cyclic number.

It is not a de Polignac number, because 13072173375461 - 2³⁰ = 13071099633637 is a prime.

It is a super-2 number, since 2×13072173375461² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13072173375161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89535434006 + ... + 89535434151.

It is an arithmetic number, because the mean of its divisors is an integer number (3312811060923).

Almost surely, 2^{13072173375461} is an apocalyptic number.

It is an amenable number.

13072173375461 is a deficient number, since it is larger than the sum of its proper divisors (179070868231).

13072173375461 is an equidigital number, since it uses as much as digits as its factorization.

13072173375461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179070868230.

The product of its (nonzero) digits is 2222640, while the sum is 50.

The spelling of 13072173375461 in words is "thirteen trillion, seventy-two billion, one hundred seventy-three million, three hundred seventy-five thousand, four hundred sixty-one".