72238536249 has 32 divisors (see below), whose sum is σ = 106107563520. Its totient is φ = 43350777600.

The previous prime is 72238536247. The next prime is 72238536263. The reversal of 72238536249 is 94263583227.

It is a happy number.

It is not a de Polignac number, because 72238536249 - 2¹ = 72238536247 is a prime.

It is a super-2 number, since 2×72238536249² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72238536247) 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, 10374129 + ... + 10381089.

It is an arithmetic number, because the mean of its divisors is an integer number (3315861360).

Almost surely, 2^72238536249 is an apocalyptic number.

It is an amenable number.

72238536249 is a deficient number, since it is larger than the sum of its proper divisors (33869027271).

72238536249 is a wasteful number, since it uses less digits than its factorization.

72238536249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10021.

The product of its digits is 4354560, while the sum is 51.

The spelling of 72238536249 in words is "seventy-two billion, two hundred thirty-eight million, five hundred thirty-six thousand, two hundred forty-nine".