15545455520 has 192 divisors, whose sum is σ = 44716976640. Its totient is φ = 4985290752.

The previous prime is 15545455459. The next prime is 15545455529. The reversal of 15545455520 is 2555454551.

15545455520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15545455520² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15545455529) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3177236 + ... + 3182124.

It is an arithmetic number, because the mean of its divisors is an integer number (232900920).

Almost surely, 2^15545455520 is an apocalyptic number.

15545455520 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 15545455520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22358488320).

15545455520 is an abundant number, since it is smaller than the sum of its proper divisors (29171521120).

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

15545455520 is a wasteful number, since it uses less digits than its factorization.

15545455520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5095 (or 5087 counting only the distinct ones).

The product of its (nonzero) digits is 500000, while the sum is 41.

The spelling of 15545455520 in words is "fifteen billion, five hundred forty-five million, four hundred fifty-five thousand, five hundred twenty".