72844850131811 has 4 divisors (see below), whose sum is σ = 72844913120112. Its totient is φ = 72844787143512.

The previous prime is 72844850131721. The next prime is 72844850131877. The reversal of 72844850131811 is 11813105844827.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72844850131811 - 2³⁰ = 72843776389987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72844850131211) 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 3 ways as a sum of consecutive naturals, for example, 29726351 + ... + 32083416.

It is an arithmetic number, because the mean of its divisors is an integer number (18211228280028).

Almost surely, 2^{72844850131811} is an apocalyptic number.

72844850131811 is a deficient number, since it is larger than the sum of its proper divisors (62988301).

72844850131811 is a wasteful number, since it uses less digits than its factorization.

72844850131811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62988300.

The product of its (nonzero) digits is 1720320, while the sum is 53.

The spelling of 72844850131811 in words is "seventy-two trillion, eight hundred forty-four billion, eight hundred fifty million, one hundred thirty-one thousand, eight hundred eleven".