161124521650 has 12 divisors (see below), whose sum is σ = 299691610362. Its totient is φ = 64449808640.

The previous prime is 161124521627. The next prime is 161124521659. The reversal of 161124521650 is 56125421161.

It can be written as a sum of positive squares in 3 ways, for example, as 129751964521 + 31372557129 = 360211^2 + 177123^2 .

It is a super-2 number, since 2×161124521650² (a number of 23 digits) contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 1611245167 + ... + 1611245266.

Almost surely, 2^161124521650 is an apocalyptic number.

161124521650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161124521650 is a deficient number, since it is larger than the sum of its proper divisors (138567088712).

161124521650 is a wasteful number, since it uses less digits than its factorization.

161124521650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222490445 (or 3222490440 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 161124521650 in words is "one hundred sixty-one billion, one hundred twenty-four million, five hundred twenty-one thousand, six hundred fifty".