72081632121 has 8 divisors (see below), whose sum is σ = 96110310720. Its totient is φ = 48053687472.

The previous prime is 72081632111. The next prime is 72081632141. The reversal of 72081632121 is 12123618027.

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

It is not a de Polignac number, because 72081632121 - 2⁶ = 72081632057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72081632111) 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, 115075 + ... + 396743.

It is an arithmetic number, because the mean of its divisors is an integer number (12013788840).

Almost surely, 2^72081632121 is an apocalyptic number.

It is an amenable number.

72081632121 is a deficient number, since it is larger than the sum of its proper divisors (24028678599).

72081632121 is a wasteful number, since it uses less digits than its factorization.

72081632121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366975.

The product of its (nonzero) digits is 8064, while the sum is 33.

The spelling of 72081632121 in words is "seventy-two billion, eighty-one million, six hundred thirty-two thousand, one hundred twenty-one".