16321507461 has 18 divisors (see below), whose sum is σ = 27424574502. Its totient is φ = 9326575440.

The previous prime is 16321507459. The next prime is 16321507507. The reversal of 16321507461 is 16470512361.

16321507461 is a `hidden beast` number, since 1 + 632 + 15 + 0 + 7 + 4 + 6 + 1 = 666.

16321507461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9388447236 + 6933060225 = 96894^2 + 83265^2 .

It is not a de Polignac number, because 16321507461 - 2¹ = 16321507459 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16321507561) 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 17 ways as a sum of consecutive naturals, for example, 18504670 + ... + 18505551.

Almost surely, 2^16321507461 is an apocalyptic number.

It is an amenable number.

16321507461 is a deficient number, since it is larger than the sum of its proper divisors (11103067041).

16321507461 is a wasteful number, since it uses less digits than its factorization.

16321507461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37010241 (or 37010231 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 16321507461 in words is "sixteen billion, three hundred twenty-one million, five hundred seven thousand, four hundred sixty-one".