7728988113550 has 24 divisors (see below), whose sum is σ = 15682819518792. Its totient is φ = 2810541132000.

The previous prime is 7728988113499. The next prime is 7728988113589. The reversal of 7728988113550 is 553118898277.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7026352281 + ... + 7026353380.

It is an arithmetic number, because the mean of its divisors is an integer number (653450813283).

Almost surely, 2^{7728988113550} is an apocalyptic number.

7728988113550 is an abundant number, since it is smaller than the sum of its proper divisors (7953831405242).

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

7728988113550 is a wasteful number, since it uses less digits than its factorization.

7728988113550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14052705684 (or 14052705679 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 64.

The spelling of 7728988113550 in words is "seven trillion, seven hundred twenty-eight billion, nine hundred eighty-eight million, one hundred thirteen thousand, five hundred fifty".