27899870768 has 80 divisors (see below), whose sum is σ = 68666247936. Its totient is φ = 10664958720.

The previous prime is 27899870767. The next prime is 27899870771. The reversal of 27899870768 is 86707899872.

It is a super-2 number, since 2×27899870768² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27899870767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148346 + ... + 278937.

Almost surely, 2^27899870768 is an apocalyptic number.

27899870768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27899870768 is an abundant number, since it is smaller than the sum of its proper divisors (40766377168).

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

27899870768 is a wasteful number, since it uses less digits than its factorization.

27899870768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427362 (or 427356 counting only the distinct ones).

The product of its (nonzero) digits is 170698752, while the sum is 71.

The spelling of 27899870768 in words is "twenty-seven billion, eight hundred ninety-nine million, eight hundred seventy thousand, seven hundred sixty-eight".