154421491092391 has 2 divisors, whose sum is σ = 154421491092392. Its totient is φ = 154421491092390.

The previous prime is 154421491092367. The next prime is 154421491092413. The reversal of 154421491092391 is 193290194124451.

154421491092391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (193290194124451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154421491092391 - 2³³ = 154412901157799 is a prime.

It is a super-2 number, since 2×154421491092391² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154421491092691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77210745546195 + 77210745546196.

It is an arithmetic number, because the mean of its divisors is an integer number (77210745546196).

Almost surely, 2^{154421491092391} is an apocalyptic number.

154421491092391 is a deficient number, since it is larger than the sum of its proper divisors (1).

154421491092391 is an equidigital number, since it uses as much as digits as its factorization.

154421491092391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2799360, while the sum is 55.

The spelling of 154421491092391 in words is "one hundred fifty-four trillion, four hundred twenty-one billion, four hundred ninety-one million, ninety-two thousand, three hundred ninety-one".