15553851420 has 24 divisors (see below), whose sum is σ = 43550784144. Its totient is φ = 4147693696.

The previous prime is 15553851409. The next prime is 15553851449. The reversal of 15553851420 is 2415835551.

15553851420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129615369 + ... + 129615488.

It is an arithmetic number, because the mean of its divisors is an integer number (1814616006).

Almost surely, 2^15553851420 is an apocalyptic number.

15553851420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15553851420 is an abundant number, since it is smaller than the sum of its proper divisors (27996932724).

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

15553851420 is a wasteful number, since it uses less digits than its factorization.

15553851420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259230869 (or 259230867 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 39.

The spelling of 15553851420 in words is "fifteen billion, five hundred fifty-three million, eight hundred fifty-one thousand, four hundred twenty".