78118135732 has 144 divisors (see below), whose sum is σ = 188113242240. Its totient is φ = 28004030208.

The previous prime is 78118135679. The next prime is 78118135747. The reversal of 78118135732 is 23753181187.

It is a super-2 number, since 2×78118135732² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1078398 + ... + 1148554.

It is an arithmetic number, because the mean of its divisors is an integer number (1306341960).

Almost surely, 2^78118135732 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 78118135732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94056621120).

78118135732 is an abundant number, since it is smaller than the sum of its proper divisors (109995106508).

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

78118135732 is a wasteful number, since it uses less digits than its factorization.

78118135732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70230 (or 70221 counting only the distinct ones).

The product of its digits is 282240, while the sum is 46.

The spelling of 78118135732 in words is "seventy-eight billion, one hundred eighteen million, one hundred thirty-five thousand, seven hundred thirty-two".