23172161461 has 2 divisors, whose sum is σ = 23172161462. Its totient is φ = 23172161460.

The previous prime is 23172161459. The next prime is 23172161483. The reversal of 23172161461 is 16416127132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20390126436 + 2782035025 = 142794^2 + 52745^2 .

It is a cyclic number.

It is not a de Polignac number, because 23172161461 - 2¹ = 23172161459 is a prime.

Together with 23172161459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23172161401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11586080730 + 11586080731.

It is an arithmetic number, because the mean of its divisors is an integer number (11586080731).

Almost surely, 2^23172161461 is an apocalyptic number.

It is an amenable number.

23172161461 is a deficient number, since it is larger than the sum of its proper divisors (1).

23172161461 is an equidigital number, since it uses as much as digits as its factorization.

23172161461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

Adding to 23172161461 its reverse (16416127132), we get a palindrome (39588288593).

The spelling of 23172161461 in words is "twenty-three billion, one hundred seventy-two million, one hundred sixty-one thousand, four hundred sixty-one".