9923644521355 has 16 divisors (see below), whose sum is σ = 12440617104384. Its totient is φ = 7590257439840.

The previous prime is 9923644521317. The next prime is 9923644521361. The reversal of 9923644521355 is 5531254463299.

9923644521355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9923644521355 - 2¹³ = 9923644513163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9923644521355.

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, 385670949 + ... + 385696678.

It is an arithmetic number, because the mean of its divisors is an integer number (777538569024).

Almost surely, 2^{9923644521355} is an apocalyptic number.

9923644521355 is a deficient number, since it is larger than the sum of its proper divisors (2516972583029).

9923644521355 is a wasteful number, since it uses less digits than its factorization.

9923644521355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771367746.

The product of its digits is 34992000, while the sum is 58.

The spelling of 9923644521355 in words is "nine trillion, nine hundred twenty-three billion, six hundred forty-four million, five hundred twenty-one thousand, three hundred fifty-five".