15275520440 has 64 divisors (see below), whose sum is σ = 36229939200. Its totient is φ = 5780446848.

The previous prime is 15275520439. The next prime is 15275520473. The reversal of 15275520440 is 4402557251.

It is a self number, because there is not a number n which added to its sum of digits gives 15275520440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 538697 + ... + 566343.

It is an arithmetic number, because the mean of its divisors is an integer number (566092800).

Almost surely, 2^15275520440 is an apocalyptic number.

15275520440 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 15275520440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18114969600).

15275520440 is an abundant number, since it is smaller than the sum of its proper divisors (20954418760).

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

15275520440 is a wasteful number, since it uses less digits than its factorization.

15275520440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28404 (or 28400 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 35.

The spelling of 15275520440 in words is "fifteen billion, two hundred seventy-five million, five hundred twenty thousand, four hundred forty".