16621132735 has 8 divisors (see below), whose sum is σ = 20812548960. Its totient is φ = 12718779744.

The previous prime is 16621132733. The next prime is 16621132793. The reversal of 16621132735 is 53723112661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16621132735 - 2¹ = 16621132733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16621132694 and 16621132703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16621132733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72265680 + ... + 72265909.

It is an arithmetic number, because the mean of its divisors is an integer number (2601568620).

Almost surely, 2^16621132735 is an apocalyptic number.

16621132735 is a deficient number, since it is larger than the sum of its proper divisors (4191416225).

16621132735 is a wasteful number, since it uses less digits than its factorization.

16621132735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144531617.

The product of its digits is 45360, while the sum is 37.

The spelling of 16621132735 in words is "sixteen billion, six hundred twenty-one million, one hundred thirty-two thousand, seven hundred thirty-five".