12426507555 has 96 divisors (see below), whose sum is σ = 25310320128. Its totient is φ = 5163110400.

The previous prime is 12426507553. The next prime is 12426507557. The reversal of 12426507555 is 55570562421.

It is an interprime number because it is at equal distance from previous prime (12426507553) and next prime (12426507557).

It is not a de Polignac number, because 12426507555 - 2¹ = 12426507553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12426507553) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2770915 + ... + 2775395.

It is an arithmetic number, because the mean of its divisors is an integer number (263649168).

Almost surely, 2^12426507555 is an apocalyptic number.

12426507555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12426507555 is an abundant number, since it is smaller than the sum of its proper divisors (12883812573).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12426507555 is an frugal number, since it uses more digits than its factorization.

12426507555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4535 (or 4507 counting only the distinct ones).

The product of its (nonzero) digits is 420000, while the sum is 42.

The spelling of 12426507555 in words is "twelve billion, four hundred twenty-six million, five hundred seven thousand, five hundred fifty-five".