78481407444 has 48 divisors (see below), whose sum is σ = 199855488000. Its totient is φ = 23772169440.

The previous prime is 78481407439. The next prime is 78481407451. The reversal of 78481407444 is 44470418487.

It is a super-2 number, since 2×78481407444² (a number of 23 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 15 ways as a sum of consecutive naturals, for example, 189807 + ... + 439305.

It is an arithmetic number, because the mean of its divisors is an integer number (4163656000).

Almost surely, 2^78481407444 is an apocalyptic number.

It is an amenable number.

78481407444 is an abundant number, since it is smaller than the sum of its proper divisors (121374080556).

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

78481407444 is a wasteful number, since it uses less digits than its factorization.

78481407444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251900 (or 251898 counting only the distinct ones).

The product of its (nonzero) digits is 3211264, while the sum is 51.

The spelling of 78481407444 in words is "seventy-eight billion, four hundred eighty-one million, four hundred seven thousand, four hundred forty-four".