15005421014144 has 64 divisors (see below), whose sum is σ = 32663898885600. Its totient is φ = 6809626705920.

The previous prime is 15005421014123. The next prime is 15005421014147. The reversal of 15005421014144 is 44141012450051.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 15005421014144.

It is not an unprimeable number, because it can be changed into a prime (15005421014147) 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, 7736897 + ... + 9480000.

Almost surely, 2^{15005421014144} is an apocalyptic number.

It is an amenable number.

15005421014144 is an abundant number, since it is smaller than the sum of its proper divisors (17658477871456).

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

15005421014144 is a wasteful number, since it uses less digits than its factorization.

15005421014144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17217541 (or 17217529 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

Adding to 15005421014144 its reverse (44141012450051), we get a palindrome (59146433464195).

The spelling of 15005421014144 in words is "fifteen trillion, five billion, four hundred twenty-one million, fourteen thousand, one hundred forty-four".