161149256787469 has 2 divisors, whose sum is σ = 161149256787470. Its totient is φ = 161149256787468.

The previous prime is 161149256787391. The next prime is 161149256787509. The reversal of 161149256787469 is 964787652941161.

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., 93396027162244 + 67753229625225 = 9664162^2 + 8231235^2 .

It is a cyclic number.

It is not a de Polignac number, because 161149256787469 - 2²⁹ = 161148719916557 is a prime.

It is a super-2 number, since 2×161149256787469² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161149256787395 and 161149256787404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161149256787269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80574628393734 + 80574628393735.

It is an arithmetic number, because the mean of its divisors is an integer number (80574628393735).

Almost surely, 2^{161149256787469} is an apocalyptic number.

It is an amenable number.

161149256787469 is a deficient number, since it is larger than the sum of its proper divisors (1).

161149256787469 is an equidigital number, since it uses as much as digits as its factorization.

161149256787469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1097349120, while the sum is 76.

The spelling of 161149256787469 in words is "one hundred sixty-one trillion, one hundred forty-nine billion, two hundred fifty-six million, seven hundred eighty-seven thousand, four hundred sixty-nine".