15654550505091 has 4 divisors (see below), whose sum is σ = 20872734006792. Its totient is φ = 10436367003392.

The previous prime is 15654550505057. The next prime is 15654550505117. The reversal of 15654550505091 is 19050505545651.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15654550505091 - 2²⁵ = 15654516950659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15654550501091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2609091750846 + ... + 2609091750851.

It is an arithmetic number, because the mean of its divisors is an integer number (5218183501698).

Almost surely, 2^{15654550505091} is an apocalyptic number.

15654550505091 is a deficient number, since it is larger than the sum of its proper divisors (5218183501701).

15654550505091 is an equidigital number, since it uses as much as digits as its factorization.

15654550505091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5218183501700.

The product of its (nonzero) digits is 3375000, while the sum is 51.

The spelling of 15654550505091 in words is "fifteen trillion, six hundred fifty-four billion, five hundred fifty million, five hundred five thousand, ninety-one".