78530804436 has 96 divisors (see below), whose sum is σ = 216299446272. Its totient is φ = 21700667520.

The previous prime is 78530804431. The next prime is 78530804437. The reversal of 78530804436 is 63440803587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78530804431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4879675 + ... + 4895741.

It is an arithmetic number, because the mean of its divisors is an integer number (2253119232).

Almost surely, 2^78530804436 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 78530804436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108149723136).

78530804436 is an abundant number, since it is smaller than the sum of its proper divisors (137768641836).

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

78530804436 is a wasteful number, since it uses less digits than its factorization.

78530804436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17989 (or 17987 counting only the distinct ones).

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

The spelling of 78530804436 in words is "seventy-eight billion, five hundred thirty million, eight hundred four thousand, four hundred thirty-six".