27995859972 has 18 divisors (see below), whose sum is σ = 70767312798. Its totient is φ = 9331953312.

The previous prime is 27995859901. The next prime is 27995859989.

27995859972 is a `hidden beast` number, since 27 + 9 + 9 + 5 + 8 + 599 + 7 + 2 = 666.

27995859972 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 14647292676 + 13348567296 = 121026^2 + 115536^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 27995859972.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 388831353 + ... + 388831424.

Almost surely, 2^27995859972 is an apocalyptic number.

It is an amenable number.

27995859972 is an abundant number, since it is smaller than the sum of its proper divisors (42771452826).

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

27995859972 is a wasteful number, since it uses less digits than its factorization.

27995859972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777662787 (or 777662782 counting only the distinct ones).

The product of its digits is 257191200, while the sum is 72.

The spelling of 27995859972 in words is "twenty-seven billion, nine hundred ninety-five million, eight hundred fifty-nine thousand, nine hundred seventy-two".