121564454546627 has 4 divisors (see below), whose sum is σ = 122521654976256. Its totient is φ = 120607254117000.

The previous prime is 121564454546621. The next prime is 121564454546669. The reversal of 121564454546627 is 726645454465121.

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 121564454546627 - 2²⁶ = 121564387437763 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 121564454546627.

It is not an unprimeable number, because it can be changed into a prime (121564454546621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478600214624 + ... + 478600214877.

It is an arithmetic number, because the mean of its divisors is an integer number (30630413744064).

Almost surely, 2^{121564454546627} is an apocalyptic number.

121564454546627 is a deficient number, since it is larger than the sum of its proper divisors (957200429629).

121564454546627 is an equidigital number, since it uses as much as digits as its factorization.

121564454546627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957200429628.

The product of its digits is 193536000, while the sum is 62.

The spelling of 121564454546627 in words is "one hundred twenty-one trillion, five hundred sixty-four billion, four hundred fifty-four million, five hundred forty-six thousand, six hundred twenty-seven".