72442466138 has 32 divisors (see below), whose sum is σ = 127346446080. Its totient is φ = 30258483840.

The previous prime is 72442466137. The next prime is 72442466141. The reversal of 72442466138 is 83166424427.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72442466092 and 72442466101.

It is not an unprimeable number, because it can be changed into a prime (72442466137) 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, 500048 + ... + 628436.

It is an arithmetic number, because the mean of its divisors is an integer number (3979576440).

Almost surely, 2^72442466138 is an apocalyptic number.

72442466138 is a deficient number, since it is larger than the sum of its proper divisors (54903979942).

72442466138 is a wasteful number, since it uses less digits than its factorization.

72442466138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129422.

The product of its digits is 1548288, while the sum is 47.

The spelling of 72442466138 in words is "seventy-two billion, four hundred forty-two million, four hundred sixty-six thousand, one hundred thirty-eight".