161003321524 has 6 divisors (see below), whose sum is σ = 281755812674. Its totient is φ = 80501660760.

The previous prime is 161003321509. The next prime is 161003321597. The reversal of 161003321524 is 425123300161.

It can be written as a sum of positive squares in only one way, i.e., 83106511524 + 77896810000 = 288282^2 + 279100^2 .

It is a junction number, because it is equal to n+sod(n) for n = 161003321492 and 161003321501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20125415187 + ... + 20125415194.

Almost surely, 2^161003321524 is an apocalyptic number.

It is an amenable number.

161003321524 is a deficient number, since it is larger than the sum of its proper divisors (120752491150).

161003321524 is a wasteful number, since it uses less digits than its factorization.

161003321524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40250830385 (or 40250830383 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 161003321524 its reverse (425123300161), we get a palindrome (586126621685).

The spelling of 161003321524 in words is "one hundred sixty-one billion, three million, three hundred twenty-one thousand, five hundred twenty-four".