78233473512 has 160 divisors (see below), whose sum is σ = 221774414400. Its totient is φ = 25764189696.

The previous prime is 78233473489. The next prime is 78233473519. The reversal of 78233473512 is 21537433287.

It is a happy number.

78233473512 is a `hidden beast` number, since 78 + 23 + 3 + 47 + 3 + 512 = 666.

It is a super-2 number, since 2×78233473512² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78233473519) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25407189 + ... + 25410267.

It is an arithmetic number, because the mean of its divisors is an integer number (1386090090).

Almost surely, 2^78233473512 is an apocalyptic number.

78233473512 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78233473512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110887207200).

78233473512 is an abundant number, since it is smaller than the sum of its proper divisors (143540940888).

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

78233473512 is a wasteful number, since it uses less digits than its factorization.

78233473512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3557 (or 3544 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The spelling of 78233473512 in words is "seventy-eight billion, two hundred thirty-three million, four hundred seventy-three thousand, five hundred twelve".