12547720278 has 36 divisors (see below), whose sum is σ = 27866058324. Its totient is φ = 4080549600.

The previous prime is 12547720259. The next prime is 12547720303. The reversal of 12547720278 is 87202774521.

12547720278 is a `hidden beast` number, since 12 + 547 + 7 + 20 + 2 + 78 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 177088 + ... + 237603.

Almost surely, 2^12547720278 is an apocalyptic number.

12547720278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12547720278 is an abundant number, since it is smaller than the sum of its proper divisors (15318338046).

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

12547720278 is a wasteful number, since it uses less digits than its factorization.

12547720278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414781 (or 414737 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 45.

The spelling of 12547720278 in words is "twelve billion, five hundred forty-seven million, seven hundred twenty thousand, two hundred seventy-eight".