15553630372 has 72 divisors (see below), whose sum is σ = 33301497600. Its totient is φ = 6328969920.

The previous prime is 15553630343. The next prime is 15553630373. The reversal of 15553630372 is 27303635551.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (15553630373) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 297879 + ... + 346177.

It is an arithmetic number, because the mean of its divisors is an integer number (462520800).

Almost surely, 2^15553630372 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15553630372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16650748800).

15553630372 is an abundant number, since it is smaller than the sum of its proper divisors (17747867228).

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

15553630372 is a wasteful number, since it uses less digits than its factorization.

15553630372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48401 (or 48392 counting only the distinct ones).

The product of its (nonzero) digits is 283500, while the sum is 40.

The spelling of 15553630372 in words is "fifteen billion, five hundred fifty-three million, six hundred thirty thousand, three hundred seventy-two".