27478105988 has 24 divisors (see below), whose sum is σ = 48510211680. Its totient is φ = 13618537920.

The previous prime is 27478105973. The next prime is 27478106041. The reversal of 27478105988 is 88950187472.

It is a super-2 number, since 2×27478105988² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162803 + ... + 285413.

It is an arithmetic number, because the mean of its divisors is an integer number (2021258820).

Almost surely, 2^27478105988 is an apocalyptic number.

It is an amenable number.

27478105988 is a deficient number, since it is larger than the sum of its proper divisors (21032105692).

27478105988 is a wasteful number, since it uses less digits than its factorization.

27478105988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123107 (or 123105 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 59.

The spelling of 27478105988 in words is "twenty-seven billion, four hundred seventy-eight million, one hundred five thousand, nine hundred eighty-eight".