78897273144 has 16 divisors (see below), whose sum is σ = 197243182920. Its totient is φ = 26299091040.

The previous prime is 78897273109. The next prime is 78897273167. The reversal of 78897273144 is 44137279887.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1643693167 + ... + 1643693214.

Almost surely, 2^78897273144 is an apocalyptic number.

It is an amenable number.

78897273144 is an abundant number, since it is smaller than the sum of its proper divisors (118345909776).

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

78897273144 is a wasteful number, since it uses less digits than its factorization.

78897273144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3287386390 (or 3287386386 counting only the distinct ones).

The product of its digits is 18966528, while the sum is 60.

The spelling of 78897273144 in words is "seventy-eight billion, eight hundred ninety-seven million, two hundred seventy-three thousand, one hundred forty-four".