32161693821 has 16 divisors (see below), whose sum is σ = 43675391424. Its totient is φ = 21047854464.

The previous prime is 32161693807. The next prime is 32161693829. The reversal of 32161693821 is 12839616123.

It is not a de Polignac number, because 32161693821 - 2¹⁷ = 32161562749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32161693829) 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, 372256 + ... + 450441.

It is an arithmetic number, because the mean of its divisors is an integer number (2729711964).

Almost surely, 2^32161693821 is an apocalyptic number.

It is an amenable number.

32161693821 is a deficient number, since it is larger than the sum of its proper divisors (11513697603).

32161693821 is a wasteful number, since it uses less digits than its factorization.

32161693821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822940.

The product of its digits is 93312, while the sum is 42.

The spelling of 32161693821 in words is "thirty-two billion, one hundred sixty-one million, six hundred ninety-three thousand, eight hundred twenty-one".