78325955444736 has 840 divisors, whose sum is σ = 254490332763744. Its totient is φ = 23998711726080.

The previous prime is 78325955444707. The next prime is 78325955444813. The reversal of 78325955444736 is 63744455952387.

78325955444736 is a `hidden beast` number, since 7 + 8 + 3 + 2 + 5 + 9 + 5 + 544 + 4 + 73 + 6 = 666.

It is a super-2 number, since 2×78325955444736² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 8731012731 + ... + 8731021701.

Almost surely, 2^{78325955444736} 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 78325955444736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127245166381872).

78325955444736 is an abundant number, since it is smaller than the sum of its proper divisors (176164377319008).

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

78325955444736 is an frugal number, since it uses more digits than its factorization.

78325955444736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9077 (or 9036 counting only the distinct ones).

The product of its digits is 3048192000, while the sum is 72.

The spelling of 78325955444736 in words is "seventy-eight trillion, three hundred twenty-five billion, nine hundred fifty-five million, four hundred forty-four thousand, seven hundred thirty-six".