161124521649 has 32 divisors (see below), whose sum is σ = 264535670784. Its totient is φ = 84948194880.

The previous prime is 161124521627. The next prime is 161124521659. The reversal of 161124521649 is 946125421161.

It is not a de Polignac number, because 161124521649 - 2¹⁵ = 161124488881 is a prime.

It is a super-2 number, since 2×161124521649² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161124521649.

It is not an unprimeable number, because it can be changed into a prime (161124521659) 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 31 ways as a sum of consecutive naturals, for example, 436512 + ... + 716094.

It is an arithmetic number, because the mean of its divisors is an integer number (8266739712).

Almost surely, 2^161124521649 is an apocalyptic number.

It is an amenable number.

161124521649 is a deficient number, since it is larger than the sum of its proper divisors (103411149135).

161124521649 is a wasteful number, since it uses less digits than its factorization.

161124521649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281717.

The product of its digits is 103680, while the sum is 42.

The spelling of 161124521649 in words is "one hundred sixty-one billion, one hundred twenty-four million, five hundred twenty-one thousand, six hundred forty-nine".