2015421330544 has 20 divisors (see below), whose sum is σ = 3913349295240. Its totient is φ = 1005524738240.

The previous prime is 2015421330509. The next prime is 2015421330553. The reversal of 2015421330544 is 4450331245102.

It is a super-2 number, since 2×2015421330544² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136612834 + ... + 136627585.

It is an arithmetic number, because the mean of its divisors is an integer number (195667464762).

Almost surely, 2^{2015421330544} is an apocalyptic number.

It is an amenable number.

2015421330544 is a deficient number, since it is larger than the sum of its proper divisors (1897927964696).

2015421330544 is a wasteful number, since it uses less digits than its factorization.

2015421330544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273240888 (or 273240882 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 2015421330544 its reverse (4450331245102), we get a palindrome (6465752575646).

The spelling of 2015421330544 in words is "two trillion, fifteen billion, four hundred twenty-one million, three hundred thirty thousand, five hundred forty-four".