72511738878 has 8 divisors (see below), whose sum is σ = 145023477768. Its totient is φ = 24170579624.

The previous prime is 72511738829. The next prime is 72511738903. The reversal of 72511738878 is 87883711527.

It is a happy number.

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

72511738878 is an admirable number.

It is a super-2 number, since 2×72511738878² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

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, 6042644901 + ... + 6042644912.

It is an arithmetic number, because the mean of its divisors is an integer number (18127934721).

Almost surely, 2^72511738878 is an apocalyptic number.

72511738878 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.

72511738878 is a wasteful number, since it uses less digits than its factorization.

72511738878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12085289818.

The product of its digits is 5268480, while the sum is 57.

The spelling of 72511738878 in words is "seventy-two billion, five hundred eleven million, seven hundred thirty-eight thousand, eight hundred seventy-eight".