15511053779648 has 112 divisors (see below), whose sum is σ = 36055723468800. Its totient is φ = 6617782547712.

The previous prime is 15511053779591. The next prime is 15511053779651. The reversal of 15511053779648 is 84697735011551.

It is a tau number, because it is divible by the number of its divisors (112).

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, 3311015 + ... + 6479577.

It is an arithmetic number, because the mean of its divisors is an integer number (321926102400).

Almost surely, 2^{15511053779648} 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 15511053779648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18027861734400).

15511053779648 is an abundant number, since it is smaller than the sum of its proper divisors (20544669689152).

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

15511053779648 is an equidigital number, since it uses as much as digits as its factorization.

15511053779648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3168819 (or 3168795 counting only the distinct ones).

The product of its (nonzero) digits is 31752000, while the sum is 62.

The spelling of 15511053779648 in words is "fifteen trillion, five hundred eleven billion, fifty-three million, seven hundred seventy-nine thousand, six hundred forty-eight".