15001813721481 has 8 divisors (see below), whose sum is σ = 20003244153600. Its totient is φ = 10000796218512.

The previous prime is 15001813721371. The next prime is 15001813721537. The reversal of 15001813721481 is 18412731810051.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15001813721481 - 2²⁶ = 15001746612617 is a prime.

It is a super-2 number, since 2×15001813721481² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15001813721581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103147506 + ... + 103292843.

It is an arithmetic number, because the mean of its divisors is an integer number (2500405519200).

Almost surely, 2^{15001813721481} is an apocalyptic number.

It is an amenable number.

15001813721481 is a deficient number, since it is larger than the sum of its proper divisors (5001430432119).

15001813721481 is a wasteful number, since it uses less digits than its factorization.

15001813721481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206464575.

The product of its (nonzero) digits is 53760, while the sum is 42.

The spelling of 15001813721481 in words is "fifteen trillion, one billion, eight hundred thirteen million, seven hundred twenty-one thousand, four hundred eighty-one".