78322511288 has 64 divisors (see below), whose sum is σ = 168720926400. Its totient is φ = 33389798400.

The previous prime is 78322511287. The next prime is 78322511321. The reversal of 78322511288 is 88211522387.

It is a super-2 number, since 2×78322511288² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78322511287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10556156 + ... + 10563572.

It is an arithmetic number, because the mean of its divisors is an integer number (2636264475).

Almost surely, 2^78322511288 is an apocalyptic number.

It is an amenable number.

78322511288 is an abundant number, since it is smaller than the sum of its proper divisors (90398415112).

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

78322511288 is a wasteful number, since it uses less digits than its factorization.

78322511288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8400 (or 8396 counting only the distinct ones).

The product of its digits is 430080, while the sum is 47.

The spelling of 78322511288 in words is "seventy-eight billion, three hundred twenty-two million, five hundred eleven thousand, two hundred eighty-eight".