15455440000 has 640 divisors, whose sum is σ = 51926878080. Its totient is φ = 4423680000.

The previous prime is 15455439983. The next prime is 15455440037. The reversal of 15455440000 is 4455451.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 80079904 + ... + 80080096.

It is an arithmetic number, because the mean of its divisors is an integer number (81135747).

Almost surely, 2^15455440000 is an apocalyptic number.

15455440000 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 15455440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25963439040).

15455440000 is an abundant number, since it is smaller than the sum of its proper divisors (36471438080).

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

15455440000 is a wasteful number, since it uses less digits than its factorization.

15455440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

Adding to 15455440000 its reverse (4455451), we get a palindrome (15459895451).

It can be divided in two parts, 154 and 55440000, that multiplied together give a square (8537760000 = 92400²).

The spelling of 15455440000 in words is "fifteen billion, four hundred fifty-five million, four hundred forty thousand".