27861800402 has 8 divisors (see below), whose sum is σ = 43233828300. Its totient is φ = 13450524304.

The previous prime is 27861800383. The next prime is 27861800413. The reversal of 27861800402 is 20400816872.

It can be written as a sum of positive squares in 2 ways, for example, as 26569326001 + 1292474401 = 163001^2 + 35951^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 240187877 + ... + 240187992.

Almost surely, 2^27861800402 is an apocalyptic number.

27861800402 is a deficient number, since it is larger than the sum of its proper divisors (15372027898).

27861800402 is a wasteful number, since it uses less digits than its factorization.

27861800402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480375900.

The product of its (nonzero) digits is 43008, while the sum is 38.

The spelling of 27861800402 in words is "twenty-seven billion, eight hundred sixty-one million, eight hundred thousand, four hundred two".