12540233455 has 4 divisors (see below), whose sum is σ = 15048280152. Its totient is φ = 10032186760.

The previous prime is 12540233371. The next prime is 12540233467. The reversal of 12540233455 is 55433204521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55433204521 = 23 ⋅2410139327.

It is not a de Polignac number, because 12540233455 - 2¹³ = 12540225263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12540233455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1254023341 + ... + 1254023350.

It is an arithmetic number, because the mean of its divisors is an integer number (3762070038).

Almost surely, 2^12540233455 is an apocalyptic number.

12540233455 is a deficient number, since it is larger than the sum of its proper divisors (2508046697).

12540233455 is an equidigital number, since it uses as much as digits as its factorization.

12540233455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508046696.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 12540233455 its reverse (55433204521), we get a palindrome (67973437976).

The spelling of 12540233455 in words is "twelve billion, five hundred forty million, two hundred thirty-three thousand, four hundred fifty-five".