72041121309 has 16 divisors (see below), whose sum is σ = 99181322240. Its totient is φ = 46465040880.

The previous prime is 72041121307. The next prime is 72041121319. The reversal of 72041121309 is 90312114027.

It is not a de Polignac number, because 72041121309 - 2¹ = 72041121307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72041121307) 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, 228072 + ... + 442830.

It is an arithmetic number, because the mean of its divisors is an integer number (6198832640).

Almost surely, 2^72041121309 is an apocalyptic number.

It is an amenable number.

72041121309 is a deficient number, since it is larger than the sum of its proper divisors (27140200931).

72041121309 is a wasteful number, since it uses less digits than its factorization.

72041121309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218400.

The product of its (nonzero) digits is 3024, while the sum is 30.

The spelling of 72041121309 in words is "seventy-two billion, forty-one million, one hundred twenty-one thousand, three hundred nine".