72172141137 has 12 divisors (see below), whose sum is σ = 106466705280. Its totient is φ = 47091042168.

The previous prime is 72172141121. The next prime is 72172141147. The reversal of 72172141137 is 73114127127.

72172141137 is a `hidden beast` number, since 7 + 217 + 21 + 411 + 3 + 7 = 666.

It is not a de Polignac number, because 72172141137 - 2⁴ = 72172141121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72172141147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85309437 + ... + 85310282.

It is an arithmetic number, because the mean of its divisors is an integer number (8872225440).

Almost surely, 2^72172141137 is an apocalyptic number.

It is an amenable number.

72172141137 is a deficient number, since it is larger than the sum of its proper divisors (34294564143).

72172141137 is a wasteful number, since it uses less digits than its factorization.

72172141137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170619772 (or 170619769 counting only the distinct ones).

The product of its digits is 16464, while the sum is 36.

The spelling of 72172141137 in words is "seventy-two billion, one hundred seventy-two million, one hundred forty-one thousand, one hundred thirty-seven".