12727420405 has 16 divisors (see below), whose sum is σ = 17510529024. Its totient is φ = 8699483520.

The previous prime is 12727420399. The next prime is 12727420483. The reversal of 12727420405 is 50402472721.

It is a de Polignac number, because none of the positive numbers 2^k-12727420405 is a prime.

It is a super-2 number, since 2×12727420405² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 569941 + ... + 591850.

It is an arithmetic number, because the mean of its divisors is an integer number (1094408064).

Almost surely, 2^12727420405 is an apocalyptic number.

It is an amenable number.

12727420405 is a deficient number, since it is larger than the sum of its proper divisors (4783108619).

12727420405 is a wasteful number, since it uses less digits than its factorization.

12727420405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162116.

The product of its (nonzero) digits is 31360, while the sum is 34.

The spelling of 12727420405 in words is "twelve billion, seven hundred twenty-seven million, four hundred twenty thousand, four hundred five".