72644330850 has 192 divisors, whose sum is σ = 222012456960. Its totient is φ = 15307833600.

The previous prime is 72644330839. The next prime is 72644330851. The reversal of 72644330850 is 5803344627.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (72644330851) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12541455 + ... + 12547245.

It is an arithmetic number, because the mean of its divisors is an integer number (1156314880).

Almost surely, 2^72644330850 is an apocalyptic number.

72644330850 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 72644330850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111006228480).

72644330850 is an abundant number, since it is smaller than the sum of its proper divisors (149368126110).

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

72644330850 is a wasteful number, since it uses less digits than its factorization.

72644330850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6745 (or 6740 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 42.

The spelling of 72644330850 in words is "seventy-two billion, six hundred forty-four million, three hundred thirty thousand, eight hundred fifty".