27281147421 has 8 divisors (see below), whose sum is σ = 39681669024. Its totient is φ = 16534028720.

The previous prime is 27281147419. The next prime is 27281147461. The reversal of 27281147421 is 12474118272.

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

It is not a de Polignac number, because 27281147421 - 2¹ = 27281147419 is a prime.

It is a super-2 number, since 2×27281147421² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27281147421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27281147461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413350686 + ... + 413350751.

It is an arithmetic number, because the mean of its divisors is an integer number (4960208628).

Almost surely, 2^27281147421 is an apocalyptic number.

It is an amenable number.

27281147421 is a deficient number, since it is larger than the sum of its proper divisors (12400521603).

27281147421 is a wasteful number, since it uses less digits than its factorization.

27281147421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826701451.

The product of its digits is 50176, while the sum is 39.

The spelling of 27281147421 in words is "twenty-seven billion, two hundred eighty-one million, one hundred forty-seven thousand, four hundred twenty-one".