161124394649 has 4 divisors (see below), whose sum is σ = 168129803136. Its totient is φ = 154118986164.

The previous prime is 161124394619. The next prime is 161124394663. The reversal of 161124394649 is 946493421161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161124394649 is a prime.

It is a super-2 number, since 2×161124394649² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161124394597 and 161124394606.

It is not an unprimeable number, because it can be changed into a prime (161124394619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3502704209 + ... + 3502704254.

It is an arithmetic number, because the mean of its divisors is an integer number (42032450784).

Almost surely, 2^161124394649 is an apocalyptic number.

It is an amenable number.

161124394649 is a deficient number, since it is larger than the sum of its proper divisors (7005408487).

161124394649 is an equidigital number, since it uses as much as digits as its factorization.

161124394649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7005408486.

The product of its digits is 1119744, while the sum is 50.

The spelling of 161124394649 in words is "one hundred sixty-one billion, one hundred twenty-four million, three hundred ninety-four thousand, six hundred forty-nine".