16621432195 has 16 divisors (see below), whose sum is σ = 21154128192. Its totient is φ = 12510495360.

The previous prime is 16621432193. The next prime is 16621432231. The reversal of 16621432195 is 59123412661.

It is not a de Polignac number, because 16621432195 - 2¹ = 16621432193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16621432193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1177692 + ... + 1191721.

It is an arithmetic number, because the mean of its divisors is an integer number (1322133012).

Almost surely, 2^16621432195 is an apocalyptic number.

16621432195 is a deficient number, since it is larger than the sum of its proper divisors (4532695997).

16621432195 is a wasteful number, since it uses less digits than its factorization.

16621432195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369502.

The product of its digits is 77760, while the sum is 40.

The spelling of 16621432195 in words is "sixteen billion, six hundred twenty-one million, four hundred thirty-two thousand, one hundred ninety-five".