72245156838 has 16 divisors (see below), whose sum is σ = 144494657136. Its totient is φ = 24080995040.

The previous prime is 72245156833. The next prime is 72245156839. The reversal of 72245156838 is 83865154227.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72245156833) 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, 59920 + ... + 384812.

It is an arithmetic number, because the mean of its divisors is an integer number (9030916071).

Almost surely, 2^72245156838 is an apocalyptic number.

72245156838 is an abundant number, since it is smaller than the sum of its proper divisors (72249500298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72245156838 is a wasteful number, since it uses less digits than its factorization.

72245156838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361959.

The product of its digits is 3225600, while the sum is 51.

The spelling of 72245156838 in words is "seventy-two billion, two hundred forty-five million, one hundred fifty-six thousand, eight hundred thirty-eight".