12540434551 has 8 divisors (see below), whose sum is σ = 12683984400. Its totient is φ = 12396943680.

The previous prime is 12540434527. The next prime is 12540434597. The reversal of 12540434551 is 15543404521.

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

It is a cyclic number.

It is not a de Polignac number, because 12540434551 - 2⁵ = 12540434519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540431551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524896 + ... + 548266.

It is an arithmetic number, because the mean of its divisors is an integer number (1585498050).

Almost surely, 2^12540434551 is an apocalyptic number.

12540434551 is a deficient number, since it is larger than the sum of its proper divisors (143549849).

12540434551 is an equidigital number, since it uses as much as digits as its factorization.

12540434551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29489.

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 12540434551 in words is "twelve billion, five hundred forty million, four hundred thirty-four thousand, five hundred fifty-one".