72869993820 has 192 divisors, whose sum is σ = 245217168000. Its totient is φ = 17858506752.

The previous prime is 72869993813. The next prime is 72869993849. The reversal of 72869993820 is 2839996827.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1584916 + ... + 1630244.

It is an arithmetic number, because the mean of its divisors is an integer number (1277172750).

Almost surely, 2^72869993820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72869993820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122608584000).

72869993820 is an abundant number, since it is smaller than the sum of its proper divisors (172347174180).

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

72869993820 is a wasteful number, since it uses less digits than its factorization.

72869993820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45589 (or 45581 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

The spelling of 72869993820 in words is "seventy-two billion, eight hundred sixty-nine million, nine hundred ninety-three thousand, eight hundred twenty".