78181432952 has 24 divisors (see below), whose sum is σ = 170523279360. Its totient is φ = 33506328240.

The previous prime is 78181432877. The next prime is 78181432961. The reversal of 78181432952 is 25923418187.

It is a super-2 number, since 2×78181432952² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78181432952.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 99720824 + ... + 99721607.

It is an arithmetic number, because the mean of its divisors is an integer number (7105136640).

Almost surely, 2^78181432952 is an apocalyptic number.

It is an amenable number.

78181432952 is an abundant number, since it is smaller than the sum of its proper divisors (92341846408).

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

78181432952 is a wasteful number, since it uses less digits than its factorization.

78181432952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199442451 (or 199442440 counting only the distinct ones).

The product of its digits is 967680, while the sum is 50.

The spelling of 78181432952 in words is "seventy-eight billion, one hundred eighty-one million, four hundred thirty-two thousand, nine hundred fifty-two".