15645045450 has 96 divisors (see below), whose sum is σ = 39386050560. Its totient is φ = 4109227200.

The previous prime is 15645045407. The next prime is 15645045457. The reversal of 15645045450 is 5454054651.

It is a junction number, because it is equal to n+sod(n) for n = 15645045399 and 15645045408.

It is not an unprimeable number, because it can be changed into a prime (15645045457) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5769595 + ... + 5772305.

It is an arithmetic number, because the mean of its divisors is an integer number (410271360).

Almost surely, 2^15645045450 is an apocalyptic number.

15645045450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15645045450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19693025280).

15645045450 is an abundant number, since it is smaller than the sum of its proper divisors (23741005110).

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

15645045450 is a wasteful number, since it uses less digits than its factorization.

15645045450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3292 (or 3287 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 39.

The spelling of 15645045450 in words is "fifteen billion, six hundred forty-five million, forty-five thousand, four hundred fifty".