12555455451 has 64 divisors (see below), whose sum is σ = 22228079616. Its totient is φ = 6102835200.

The previous prime is 12555455447. The next prime is 12555455501. The reversal of 12555455451 is 15455455521.

It is a happy number.

It is not a de Polignac number, because 12555455451 - 2² = 12555455447 is a prime.

It is a super-2 number, since 2×12555455451² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12555455351) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 670131 + ... + 688611.

It is an arithmetic number, because the mean of its divisors is an integer number (347313744).

Almost surely, 2^12555455451 is an apocalyptic number.

12555455451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12555455451 is a deficient number, since it is larger than the sum of its proper divisors (9672624165).

12555455451 is a wasteful number, since it uses less digits than its factorization.

12555455451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18692.

The product of its digits is 500000, while the sum is 42.

The spelling of 12555455451 in words is "twelve billion, five hundred fifty-five million, four hundred fifty-five thousand, four hundred fifty-one".