27750000078 has 24 divisors (see below), whose sum is σ = 60358959648. Its totient is φ = 9214006272.

The previous prime is 27750000073. The next prime is 27750000079. The reversal of 27750000078 is 87000005772.

It is a junction number, because it is equal to n+sod(n) for n = 27749999997 and 27750000051.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27750000073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2994726 + ... + 3003977.

It is an arithmetic number, because the mean of its divisors is an integer number (2514956652).

Almost surely, 2^27750000078 is an apocalyptic number.

27750000078 is an abundant number, since it is smaller than the sum of its proper divisors (32608959570).

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

27750000078 is a wasteful number, since it uses less digits than its factorization.

27750000078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5998968 (or 5998965 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 36.

The spelling of 27750000078 in words is "twenty-seven billion, seven hundred fifty million, seventy-eight", and thus it is an aban number.