27661281912145 has 8 divisors (see below), whose sum is σ = 37935472336704. Its totient is φ = 18967736168304.

The previous prime is 27661281912113. The next prime is 27661281912179. The reversal of 27661281912145 is 54121918216672.

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

It is not a de Polignac number, because 27661281912145 - 2⁵ = 27661281912113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395161170139 + ... + 395161170208.

It is an arithmetic number, because the mean of its divisors is an integer number (4741934042088).

Almost surely, 2^{27661281912145} is an apocalyptic number.

It is an amenable number.

27661281912145 is a deficient number, since it is larger than the sum of its proper divisors (10274190424559).

27661281912145 is an equidigital number, since it uses as much as digits as its factorization.

27661281912145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790322340359.

The product of its digits is 2903040, while the sum is 55.

The spelling of 27661281912145 in words is "twenty-seven trillion, six hundred sixty-one billion, two hundred eighty-one million, nine hundred twelve thousand, one hundred forty-five".