12251551503544 has 128 divisors (see below), whose sum is σ = 25343724257280. Its totient is φ = 5533167024000.

The previous prime is 12251551503511. The next prime is 12251551503551. The reversal of 12251551503544 is 44530515515221.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 12251551503544.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257757109 + ... + 257804635.

It is an arithmetic number, because the mean of its divisors is an integer number (197997845760).

Almost surely, 2^{12251551503544} is an apocalyptic number.

It is an amenable number.

12251551503544 is an abundant number, since it is smaller than the sum of its proper divisors (13092172753736).

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

12251551503544 is a wasteful number, since it uses less digits than its factorization.

12251551503544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48681 (or 48677 counting only the distinct ones).

The product of its (nonzero) digits is 600000, while the sum is 43.

The spelling of 12251551503544 in words is "twelve trillion, two hundred fifty-one billion, five hundred fifty-one million, five hundred three thousand, five hundred forty-four".