161257574887 has 2 divisors, whose sum is σ = 161257574888. Its totient is φ = 161257574886.

The previous prime is 161257574867. The next prime is 161257574893. The reversal of 161257574887 is 788475752161.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (788475752161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161257574887 - 2²³ = 161249186279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161257574867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80628787443 + 80628787444.

It is an arithmetic number, because the mean of its divisors is an integer number (80628787444).

Almost surely, 2^161257574887 is an apocalyptic number.

161257574887 is a deficient number, since it is larger than the sum of its proper divisors (1).

161257574887 is an equidigital number, since it uses as much as digits as its factorization.

161257574887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26342400, while the sum is 61.

The spelling of 161257574887 in words is "one hundred sixty-one billion, two hundred fifty-seven million, five hundred seventy-four thousand, eight hundred eighty-seven".