72780549918 has 8 divisors (see below), whose sum is σ = 145561099848. Its totient is φ = 24260183304.

The previous prime is 72780549913. The next prime is 72780549931. The reversal of 72780549918 is 81994508727.

It is a sphenic number, since it is the product of 3 distinct primes.

72780549918 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72780549913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6065045821 + ... + 6065045832.

It is an arithmetic number, because the mean of its divisors is an integer number (18195137481).

Almost surely, 2^72780549918 is an apocalyptic number.

72780549918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

72780549918 is a wasteful number, since it uses less digits than its factorization.

72780549918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12130091658.

The product of its (nonzero) digits is 10160640, while the sum is 60.

The spelling of 72780549918 in words is "seventy-two billion, seven hundred eighty million, five hundred forty-nine thousand, nine hundred eighteen".