15121144243452 has 48 divisors (see below), whose sum is σ = 38079144002592. Its totient is φ = 4642567207680.

The previous prime is 15121144243433. The next prime is 15121144243477. The reversal of 15121144243452 is 25434244112151.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 15121144243452.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 105058683 + ... + 105202514.

It is an arithmetic number, because the mean of its divisors is an integer number (793315500054).

Almost surely, 2^{15121144243452} is an apocalyptic number.

15121144243452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15121144243452 is an abundant number, since it is smaller than the sum of its proper divisors (22957999759140).

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

15121144243452 is a wasteful number, since it uses less digits than its factorization.

15121144243452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210261678 (or 210261676 counting only the distinct ones).

The product of its digits is 153600, while the sum is 39.

The spelling of 15121144243452 in words is "fifteen trillion, one hundred twenty-one billion, one hundred forty-four million, two hundred forty-three thousand, four hundred fifty-two".