78504955440 has 160 divisors (see below), whose sum is σ = 256694880000. Its totient is φ = 19792512000.

The previous prime is 78504955433. The next prime is 78504955453. The reversal of 78504955440 is 4455940587.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2258190 + ... + 2292690.

It is an arithmetic number, because the mean of its divisors is an integer number (1604343000).

Almost surely, 2^78504955440 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 78504955440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128347440000).

78504955440 is an abundant number, since it is smaller than the sum of its proper divisors (178189924560).

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

78504955440 is a wasteful number, since it uses less digits than its factorization.

78504955440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35035 (or 35029 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 51.

The spelling of 78504955440 in words is "seventy-eight billion, five hundred four million, nine hundred fifty-five thousand, four hundred forty".