15645453216 has 48 divisors (see below), whose sum is σ = 41647773888. Its totient is φ = 5141696000.

The previous prime is 15645453203. The next prime is 15645453217. The reversal of 15645453216 is 61235454651.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (15645453217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1140885 + ... + 1154516.

It is an arithmetic number, because the mean of its divisors is an integer number (867661956).

Almost surely, 2^15645453216 is an apocalyptic number.

15645453216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15645453216 is an abundant number, since it is smaller than the sum of its proper divisors (26002320672).

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

15645453216 is a wasteful number, since it uses less digits than its factorization.

15645453216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295485 (or 2295477 counting only the distinct ones).

The product of its digits is 432000, while the sum is 42.

The spelling of 15645453216 in words is "fifteen billion, six hundred forty-five million, four hundred fifty-three thousand, two hundred sixteen".