78533862420 has 192 divisors, whose sum is σ = 249500160000. Its totient is φ = 18297321984.

The previous prime is 78533862413. The next prime is 78533862437. The reversal of 78533862420 is 2426833587.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 78533862420.

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, 25177621 + ... + 25180739.

It is an arithmetic number, because the mean of its divisors is an integer number (1299480000).

Almost surely, 2^78533862420 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 78533862420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124750080000).

78533862420 is an abundant number, since it is smaller than the sum of its proper divisors (170966297580).

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

78533862420 is a wasteful number, since it uses less digits than its factorization.

78533862420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4862 (or 4860 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 48.

The spelling of 78533862420 in words is "seventy-eight billion, five hundred thirty-three million, eight hundred sixty-two thousand, four hundred twenty".