78581361285 has 48 divisors (see below), whose sum is σ = 156037714560. Its totient is φ = 35837112960.

The previous prime is 78581361259. The next prime is 78581361293. The reversal of 78581361285 is 58216318587.

78581361285 is a `hidden beast` number, since 7 + 8 + 5 + 8 + 13 + 612 + 8 + 5 = 666.

It is not a de Polignac number, because 78581361285 - 2⁵ = 78581361253 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 165706 + ... + 429675.

It is an arithmetic number, because the mean of its divisors is an integer number (3250785720).

Almost surely, 2^78581361285 is an apocalyptic number.

It is an amenable number.

78581361285 is a deficient number, since it is larger than the sum of its proper divisors (77456353275).

78581361285 is a wasteful number, since it uses less digits than its factorization.

78581361285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595818 (or 595815 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 54.

The spelling of 78581361285 in words is "seventy-eight billion, five hundred eighty-one million, three hundred sixty-one thousand, two hundred eighty-five".