27234581621 has 16 divisors (see below), whose sum is σ = 32056593408. Its totient is φ = 22897555200.

The previous prime is 27234581617. The next prime is 27234581629. The reversal of 27234581621 is 12618543272.

It is not a de Polignac number, because 27234581621 - 2² = 27234581617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27234581629) 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, 1980785 + ... + 1994486.

It is an arithmetic number, because the mean of its divisors is an integer number (2003537088).

Almost surely, 2^27234581621 is an apocalyptic number.

It is an amenable number.

27234581621 is a deficient number, since it is larger than the sum of its proper divisors (4822011787).

27234581621 is a wasteful number, since it uses less digits than its factorization.

27234581621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3975332.

The product of its digits is 161280, while the sum is 41.

The spelling of 27234581621 in words is "twenty-seven billion, two hundred thirty-four million, five hundred eighty-one thousand, six hundred twenty-one".