154239492479 has 4 divisors (see below), whose sum is σ = 154283577000. Its totient is φ = 154195407960.

The previous prime is 154239492349. The next prime is 154239492499. The reversal of 154239492479 is 974294932451.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974294932451 = 23 ⋅42360649237.

It is a cyclic number.

It is not a de Polignac number, because 154239492479 - 2²⁴ = 154222715263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154239492499) 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, 22037012 + ... + 22044009.

It is an arithmetic number, because the mean of its divisors is an integer number (38570894250).

Almost surely, 2^154239492479 is an apocalyptic number.

154239492479 is a deficient number, since it is larger than the sum of its proper divisors (44084521).

154239492479 is an equidigital number, since it uses as much as digits as its factorization.

154239492479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44084520.

The product of its digits is 19595520, while the sum is 59.

The spelling of 154239492479 in words is "one hundred fifty-four billion, two hundred thirty-nine million, four hundred ninety-two thousand, four hundred seventy-nine".