78471775168444 has 18 divisors (see below), whose sum is σ = 159746113736160. Its totient is φ = 33630760786392.

The previous prime is 78471775168441. The next prime is 78471775168453. The reversal of 78471775168444 is 44486157717487.

It is a super-2 number, since 2×78471775168444² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78471775168441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 200183099724 + ... + 200183100115.

Almost surely, 2^{78471775168444} is an apocalyptic number.

It is an amenable number.

78471775168444 is an abundant number, since it is smaller than the sum of its proper divisors (81274338567716).

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

78471775168444 is a wasteful number, since it uses less digits than its factorization.

78471775168444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400366199857 (or 400366199848 counting only the distinct ones).

The product of its digits is 1180139520, while the sum is 73.

The spelling of 78471775168444 in words is "seventy-eight trillion, four hundred seventy-one billion, seven hundred seventy-five million, one hundred sixty-eight thousand, four hundred forty-four".