32438721081 has 32 divisors (see below), whose sum is σ = 48258846720. Its totient is φ = 19244332800.

The previous prime is 32438721059. The next prime is 32438721097. The reversal of 32438721081 is 18012783423.

It is not a de Polignac number, because 32438721081 - 2¹⁵ = 32438688313 is a prime.

It is a super-2 number, since 2×32438721081² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (32438721181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 725896 + ... + 769286.

It is an arithmetic number, because the mean of its divisors is an integer number (1508088960).

Almost surely, 2^32438721081 is an apocalyptic number.

It is an amenable number.

32438721081 is a deficient number, since it is larger than the sum of its proper divisors (15820125639).

32438721081 is a wasteful number, since it uses less digits than its factorization.

32438721081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44097.

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 32438721081 in words is "thirty-two billion, four hundred thirty-eight million, seven hundred twenty-one thousand, eighty-one".