27781026043001 has 16 divisors (see below), whose sum is σ = 34682701022208. Its totient is φ = 21618417382800.

The previous prime is 27781026042971. The next prime is 27781026043007. The reversal of 27781026043001 is 10034062018772.

It is a de Polignac number, because none of the positive numbers 2^k-27781026043001 is a prime.

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 27781026043001.

It is not an unprimeable number, because it can be changed into a prime (27781026043007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242737235 + ... + 242851656.

It is an arithmetic number, because the mean of its divisors is an integer number (2167668813888).

Almost surely, 2^{27781026043001} is an apocalyptic number.

It is an amenable number.

27781026043001 is a deficient number, since it is larger than the sum of its proper divisors (6901674979207).

27781026043001 is a wasteful number, since it uses less digits than its factorization.

27781026043001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485589652.

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 27781026043001 in words is "twenty-seven trillion, seven hundred eighty-one billion, twenty-six million, forty-three thousand, one".