15648689209920 has 224 divisors, whose sum is σ = 53510363010048. Its totient is φ = 3851705475072.

The previous prime is 15648689209889. The next prime is 15648689209943. The reversal of 15648689209920 is 2990298684651.

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 31 ways as a sum of consecutive naturals, for example, 211211922 + ... + 211285998.

It is an arithmetic number, because the mean of its divisors is an integer number (238885549152).

Almost surely, 2^{15648689209920} is an apocalyptic number.

15648689209920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15648689209920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26755181505024).

15648689209920 is an abundant number, since it is smaller than the sum of its proper divisors (37861673800128).

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

15648689209920 is a wasteful number, since it uses less digits than its factorization.

15648689209920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91037 (or 91027 counting only the distinct ones).

The product of its (nonzero) digits is 134369280, while the sum is 69.

The spelling of 15648689209920 in words is "fifteen trillion, six hundred forty-eight billion, six hundred eighty-nine million, two hundred nine thousand, nine hundred twenty".