78195174843240 has 768 divisors, whose sum is σ = 323009878464000. Its totient is φ = 16299519860736.

The previous prime is 78195174843217. The next prime is 78195174843251. The reversal of 78195174843240 is 4234847159187.

78195174843240 is a `hidden beast` number, since 7 + 8 + 1 + 9 + 517 + 4 + 84 + 32 + 4 + 0 = 666.

It is a super-2 number, since 2×78195174843240² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 132941472 + ... + 133528368.

It is an arithmetic number, because the mean of its divisors is an integer number (420585779250).

Almost surely, 2^{78195174843240} is an apocalyptic number.

78195174843240 is a gapful number since it is divisible by the number (70) 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 78195174843240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161504939232000).

78195174843240 is an abundant number, since it is smaller than the sum of its proper divisors (244814703620760).

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

78195174843240 is a wasteful number, since it uses less digits than its factorization.

78195174843240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587031 (or 587010 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 63.

The spelling of 78195174843240 in words is "seventy-eight trillion, one hundred ninety-five billion, one hundred seventy-four million, eight hundred forty-three thousand, two hundred forty".