1515550414420 has 24 divisors (see below), whose sum is σ = 3637320994944. Its totient is φ = 519617284896.

The previous prime is 1515550414403. The next prime is 1515550414429. The reversal of 1515550414420 is 244140555151.

It is a self number, because there is not a number n which added to its sum of digits gives 1515550414420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1515550414429) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5412679912 + ... + 5412680191.

It is an arithmetic number, because the mean of its divisors is an integer number (151555041456).

Almost surely, 2^{1515550414420} is an apocalyptic number.

1515550414420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1515550414420 is an abundant number, since it is smaller than the sum of its proper divisors (2121770580524).

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

1515550414420 is a wasteful number, since it uses less digits than its factorization.

1515550414420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10825360119 (or 10825360117 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 37.

Adding to 1515550414420 its reverse (244140555151), we get a palindrome (1759690969571).

The spelling of 1515550414420 in words is "one trillion, five hundred fifteen billion, five hundred fifty million, four hundred fourteen thousand, four hundred twenty".