27880263851 has 4 divisors (see below), whose sum is σ = 30414833304. Its totient is φ = 25345694400.

The previous prime is 27880263839. The next prime is 27880263893. The reversal of 27880263851 is 15836208872.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27880263851 - 2⁶ = 27880263787 is a prime.

It is a super-2 number, since 2×27880263851² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27880263851.

It is not an unprimeable number, because it can be changed into a prime (27880263451) 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 3 ways as a sum of consecutive naturals, for example, 1267284710 + ... + 1267284731.

It is an arithmetic number, because the mean of its divisors is an integer number (7603708326).

Almost surely, 2^27880263851 is an apocalyptic number.

27880263851 is a deficient number, since it is larger than the sum of its proper divisors (2534569453).

27880263851 is a wasteful number, since it uses less digits than its factorization.

27880263851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534569452.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 27880263851 in words is "twenty-seven billion, eight hundred eighty million, two hundred sixty-three thousand, eight hundred fifty-one".