27140906521 has 4 divisors (see below), whose sum is σ = 28737430452. Its totient is φ = 25544382592.

The previous prime is 27140906501. The next prime is 27140906531. The reversal of 27140906521 is 12560904172.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13420064025 + 13720842496 = 115845^2 + 117136^2 .

It is a cyclic number.

It is not a de Polignac number, because 27140906521 - 2¹¹ = 27140904473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27140906501) 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, 798261940 + ... + 798261973.

It is an arithmetic number, because the mean of its divisors is an integer number (7184357613).

Almost surely, 2^27140906521 is an apocalyptic number.

It is an amenable number.

27140906521 is a deficient number, since it is larger than the sum of its proper divisors (1596523931).

27140906521 is a wasteful number, since it uses less digits than its factorization.

27140906521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596523930.

The product of its (nonzero) digits is 30240, while the sum is 37.

It can be divided in two parts, 27140 and 906521, that added together give a triangular number (933661 = T₁₃₆₆).

The spelling of 27140906521 in words is "twenty-seven billion, one hundred forty million, nine hundred six thousand, five hundred twenty-one".