12540391414 has 4 divisors (see below), whose sum is σ = 18810587124. Its totient is φ = 6270195706.

The previous prime is 12540391403. The next prime is 12540391447. The reversal of 12540391414 is 41419304521.

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

It is a super-2 number, since 2×12540391414² (a number of 21 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 12540391414.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3135097852 + ... + 3135097855.

It is an arithmetic number, because the mean of its divisors is an integer number (4702646781).

Almost surely, 2^12540391414 is an apocalyptic number.

12540391414 is a deficient number, since it is larger than the sum of its proper divisors (6270195710).

12540391414 is an equidigital number, since it uses as much as digits as its factorization.

12540391414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6270195709.

The product of its (nonzero) digits is 17280, while the sum is 34.

Adding to 12540391414 its reverse (41419304521), we get a palindrome (53959695935).

The spelling of 12540391414 in words is "twelve billion, five hundred forty million, three hundred ninety-one thousand, four hundred fourteen".