78731472652 has 144 divisors (see below), whose sum is σ = 169134376320. Its totient is φ = 31957196544.

The previous prime is 78731472593. The next prime is 78731472667. The reversal of 78731472652 is 25627413787.

It is a self number, because there is not a number n which added to its sum of digits gives 78731472652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1078513288 + ... + 1078513360.

It is an arithmetic number, because the mean of its divisors is an integer number (1174544280).

Almost surely, 2^78731472652 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78731472652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84567188160).

78731472652 is an abundant number, since it is smaller than the sum of its proper divisors (90402903668).

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

78731472652 is an equidigital number, since it uses as much as digits as its factorization.

78731472652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 182 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 52.

The spelling of 78731472652 in words is "seventy-eight billion, seven hundred thirty-one million, four hundred seventy-two thousand, six hundred fifty-two".