78218842460408 has 256 divisors, whose sum is σ = 174916012723200. Its totient is φ = 32444233113600.

The previous prime is 78218842460389. The next prime is 78218842460443. The reversal of 78218842460408 is 80406424881287.

It is a super-2 number, since 2×78218842460408² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1757428091 + ... + 1757472597.

It is an arithmetic number, because the mean of its divisors is an integer number (683265674700).

Almost surely, 2^{78218842460408} 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 78218842460408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87458006361600).

78218842460408 is an abundant number, since it is smaller than the sum of its proper divisors (96697170262792).

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

78218842460408 is a wasteful number, since it uses less digits than its factorization.

78218842460408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44950 (or 44946 counting only the distinct ones).

The product of its (nonzero) digits is 44040192, while the sum is 62.

The spelling of 78218842460408 in words is "seventy-eight trillion, two hundred eighteen billion, eight hundred forty-two million, four hundred sixty thousand, four hundred eight".