72478382736 has 80 divisors (see below), whose sum is σ = 195635514240. Its totient is φ = 23078415360.

The previous prime is 72478382693. The next prime is 72478382761. The reversal of 72478382736 is 63728387427.

It is a super-2 number, since 2×72478382736² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 797010 + ... + 883278.

It is an arithmetic number, because the mean of its divisors is an integer number (2445443928).

Almost surely, 2^72478382736 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 72478382736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97817757120).

72478382736 is an abundant number, since it is smaller than the sum of its proper divisors (123157131504).

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

72478382736 is a wasteful number, since it uses less digits than its factorization.

72478382736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87064 (or 87058 counting only the distinct ones).

The product of its digits is 18966528, while the sum is 57.

The spelling of 72478382736 in words is "seventy-two billion, four hundred seventy-eight million, three hundred eighty-two thousand, seven hundred thirty-six".