78334446636144 has 120 divisors (see below), whose sum is σ = 226315492595712. Its totient is φ = 25267391959680.

The previous prime is 78334446636143. The next prime is 78334446636157. The reversal of 78334446636144 is 44163664443387.

It is a happy number.

78334446636144 is a `hidden beast` number, since 7 + 8 + 3 + 3 + 4 + 4 + 4 + 6 + 6 + 3 + 614 + 4 = 666.

It is a super-2 number, since 2×78334446636144² (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 (78334446636143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63343317 + ... + 64568139.

Almost surely, 2^{78334446636144} is an apocalyptic number.

It is an amenable number.

78334446636144 is an abundant number, since it is smaller than the sum of its proper divisors (147981045959568).

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

78334446636144 is a wasteful number, since it uses less digits than its factorization.

78334446636144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239195 (or 1239186 counting only the distinct ones).

The product of its digits is 334430208, while the sum is 63.

The spelling of 78334446636144 in words is "seventy-eight trillion, three hundred thirty-four billion, four hundred forty-six million, six hundred thirty-six thousand, one hundred forty-four".