72073998868 has 12 divisors (see below), whose sum is σ = 127546684020. Its totient is φ = 35632089152.

The previous prime is 72073998817. The next prime is 72073998877. The reversal of 72073998868 is 86889937027.

It can be written as a sum of positive squares in 2 ways, for example, as 50828604304 + 21245394564 = 225452^2 + 145758^2 .

It is a super-2 number, since 2×72073998868² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101227171 + ... + 101227882.

It is an arithmetic number, because the mean of its divisors is an integer number (10628890335).

Almost surely, 2^72073998868 is an apocalyptic number.

It is an amenable number.

72073998868 is a deficient number, since it is larger than the sum of its proper divisors (55472685152).

72073998868 is a wasteful number, since it uses less digits than its factorization.

72073998868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202455146 (or 202455144 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 67.

The spelling of 72073998868 in words is "seventy-two billion, seventy-three million, nine hundred ninety-eight thousand, eight hundred sixty-eight".