16125174820861 has 2 divisors, whose sum is σ = 16125174820862. Its totient is φ = 16125174820860.

The previous prime is 16125174820841. The next prime is 16125174820877. The reversal of 16125174820861 is 16802847152161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14502531951961 + 1622642868900 = 3808219^2 + 1273830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16125174820861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16125174820799 and 16125174820808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16125174820841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8062587410430 + 8062587410431.

It is an arithmetic number, because the mean of its divisors is an integer number (8062587410431).

Almost surely, 2^{16125174820861} is an apocalyptic number.

It is an amenable number.

16125174820861 is a deficient number, since it is larger than the sum of its proper divisors (1).

16125174820861 is an equidigital number, since it uses as much as digits as its factorization.

16125174820861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1290240, while the sum is 52.

The spelling of 16125174820861 in words is "sixteen trillion, one hundred twenty-five billion, one hundred seventy-four million, eight hundred twenty thousand, eight hundred sixty-one".