78530511888 has 60 divisors (see below), whose sum is σ = 220324595868. Its totient is φ = 26111539200.

The previous prime is 78530511887. The next prime is 78530511911. The reversal of 78530511888 is 88811503587.

78530511888 is a `hidden beast` number, since 78 + 53 + 0 + 511 + 8 + 8 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 61917364224 + 16613147664 = 248832^2 + 128892^2 .

It is not an unprimeable number, because it can be changed into a prime (78530511887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 622245 + ... + 737732.

Almost surely, 2^78530511888 is an apocalyptic number.

It is an amenable number.

78530511888 is an abundant number, since it is smaller than the sum of its proper divisors (141794083980).

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

78530511888 is a wasteful number, since it uses less digits than its factorization.

78530511888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360392 (or 1360383 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 54.

The spelling of 78530511888 in words is "seventy-eight billion, five hundred thirty million, five hundred eleven thousand, eight hundred eighty-eight".