115720516278 has 24 divisors (see below), whose sum is σ = 250778016216. Its totient is φ = 38565777600.

The previous prime is 115720516273. The next prime is 115720516319. The reversal of 115720516278 is 872615027511.

115720516278 is a `hidden beast` number, since 1 + 1 + 572 + 0 + 5 + 1 + 6 + 2 + 78 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115720516273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 551283 + ... + 731678.

It is an arithmetic number, because the mean of its divisors is an integer number (10449084009).

Almost surely, 2^115720516278 is an apocalyptic number.

115720516278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

115720516278 is an abundant number, since it is smaller than the sum of its proper divisors (135057499938).

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

115720516278 is a wasteful number, since it uses less digits than its factorization.

115720516278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287980 (or 1287977 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 45.

The spelling of 115720516278 in words is "one hundred fifteen billion, seven hundred twenty million, five hundred sixteen thousand, two hundred seventy-eight".