12451155549 has 32 divisors (see below), whose sum is σ = 19598008320. Its totient is φ = 6880939200.

The previous prime is 12451155533. The next prime is 12451155553. The reversal of 12451155549 is 94555115421.

It is not a de Polignac number, because 12451155549 - 2⁴ = 12451155533 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12451155549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12451155649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1159294 + ... + 1169984.

It is an arithmetic number, because the mean of its divisors is an integer number (612437760).

Almost surely, 2^12451155549 is an apocalyptic number.

It is an amenable number.

12451155549 is a deficient number, since it is larger than the sum of its proper divisors (7146852771).

12451155549 is a wasteful number, since it uses less digits than its factorization.

12451155549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12521.

The product of its digits is 180000, while the sum is 42.

The spelling of 12451155549 in words is "twelve billion, four hundred fifty-one million, one hundred fifty-five thousand, five hundred forty-nine".