27802081251 has 24 divisors (see below), whose sum is σ = 47595335424. Its totient is φ = 15886902600.

The previous prime is 27802081217. The next prime is 27802081273. The reversal of 27802081251 is 15218020872.

It is not a de Polignac number, because 27802081251 - 2⁷ = 27802081123 is a prime.

It is a super-3 number, since 3×27802081251³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (27802081211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8170575 + ... + 8173976.

It is an arithmetic number, because the mean of its divisors is an integer number (1983138976).

Almost surely, 2^27802081251 is an apocalyptic number.

27802081251 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

27802081251 is a deficient number, since it is larger than the sum of its proper divisors (19793254173).

27802081251 is an equidigital number, since it uses as much as digits as its factorization.

27802081251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16344573 (or 16344561 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The spelling of 27802081251 in words is "twenty-seven billion, eight hundred two million, eighty-one thousand, two hundred fifty-one".