134865621827 has 4 divisors (see below), whose sum is σ = 134894303040. Its totient is φ = 134836940616.

The previous prime is 134865621707. The next prime is 134865621857. The reversal of 134865621827 is 728126568431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 728126568431 = 34469 ⋅21124099.

It is a cyclic number.

It is not a de Polignac number, because 134865621827 - 2¹⁴ = 134865605443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134865621857) 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, 14333552 + ... + 14342957.

It is an arithmetic number, because the mean of its divisors is an integer number (33723575760).

Almost surely, 2^134865621827 is an apocalyptic number.

134865621827 is a deficient number, since it is larger than the sum of its proper divisors (28681213).

134865621827 is an equidigital number, since it uses as much as digits as its factorization.

134865621827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28681212.

The product of its digits is 3870720, while the sum is 53.

The spelling of 134865621827 in words is "one hundred thirty-four billion, eight hundred sixty-five million, six hundred twenty-one thousand, eight hundred twenty-seven".