16643443831707 has 16 divisors (see below), whose sum is σ = 27667023512832. Its totient is φ = 8645944847520.

The previous prime is 16643443831681. The next prime is 16643443831717. The reversal of 16643443831707 is 70713834434661.

It is not a de Polignac number, because 16643443831707 - 2⁸ = 16643443831451 is a prime.

It is a super-2 number, since 2×16643443831707² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16643443831717) 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, 36024769968 + ... + 36024770429.

It is an arithmetic number, because the mean of its divisors is an integer number (1729188969552).

Almost surely, 2^{16643443831707} is an apocalyptic number.

16643443831707 is a deficient number, since it is larger than the sum of its proper divisors (11023579681125).

16643443831707 is a wasteful number, since it uses less digits than its factorization.

16643443831707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72049540418.

The product of its (nonzero) digits is 24385536, while the sum is 57.

The spelling of 16643443831707 in words is "sixteen trillion, six hundred forty-three billion, four hundred forty-three million, eight hundred thirty-one thousand, seven hundred seven".