27081651401 has 4 divisors (see below), whose sum is σ = 30950458752. Its totient is φ = 23212844052.

The previous prime is 27081651391. The next prime is 27081651413. The reversal of 27081651401 is 10415618072.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27081651401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27081654401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1934403665 + ... + 1934403678.

It is an arithmetic number, because the mean of its divisors is an integer number (7737614688).

Almost surely, 2^27081651401 is an apocalyptic number.

It is an amenable number.

27081651401 is a deficient number, since it is larger than the sum of its proper divisors (3868807351).

27081651401 is an equidigital number, since it uses as much as digits as its factorization.

27081651401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3868807350.

The product of its (nonzero) digits is 13440, while the sum is 35.

The spelling of 27081651401 in words is "twenty-seven billion, eighty-one million, six hundred fifty-one thousand, four hundred one".