169860997541 has 2 divisors, whose sum is σ = 169860997542. Its totient is φ = 169860997540.

The previous prime is 169860997513. The next prime is 169860997567. The reversal of 169860997541 is 145799068961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88595522500 + 81265475041 = 297650^2 + 285071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169860997541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169860991541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84930498770 + 84930498771.

It is an arithmetic number, because the mean of its divisors is an integer number (84930498771).

Almost surely, 2^169860997541 is an apocalyptic number.

It is an amenable number.

169860997541 is a deficient number, since it is larger than the sum of its proper divisors (1).

169860997541 is an equidigital number, since it uses as much as digits as its factorization.

169860997541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29393280, while the sum is 65.

The spelling of 169860997541 in words is "one hundred sixty-nine billion, eight hundred sixty million, nine hundred ninety-seven thousand, five hundred forty-one".