73218081938 has 16 divisors (see below), whose sum is σ = 110339663616. Its totient is φ = 36438254160.

The previous prime is 73218081929. The next prime is 73218081943. The reversal of 73218081938 is 83918081237.

It is a super-3 number, since 3×73218081938³ (a number of 34 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3236948 + ... + 3259488.

It is an arithmetic number, because the mean of its divisors is an integer number (6896228976).

Almost surely, 2^73218081938 is an apocalyptic number.

73218081938 is a deficient number, since it is larger than the sum of its proper divisors (37121581678).

73218081938 is a wasteful number, since it uses less digits than its factorization.

73218081938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30049.

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 73218081938 in words is "seventy-three billion, two hundred eighteen million, eighty-one thousand, nine hundred thirty-eight".