154202543654491 has 4 divisors (see below), whose sum is σ = 154985297683392. Its totient is φ = 153419789625592.

The previous prime is 154202543654483. The next prime is 154202543654501. The reversal of 154202543654491 is 194456345202451.

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 154202543654491 - 2³ = 154202543654483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154202543654191) 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, 391377014155 + ... + 391377014548.

It is an arithmetic number, because the mean of its divisors is an integer number (38746324420848).

Almost surely, 2^{154202543654491} is an apocalyptic number.

154202543654491 is a deficient number, since it is larger than the sum of its proper divisors (782754028901).

154202543654491 is an equidigital number, since it uses as much as digits as its factorization.

154202543654491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782754028900.

The product of its (nonzero) digits is 20736000, while the sum is 55.

The spelling of 154202543654491 in words is "one hundred fifty-four trillion, two hundred two billion, five hundred forty-three million, six hundred fifty-four thousand, four hundred ninety-one".