320154251601623 has 4 divisors (see below), whose sum is σ = 321177108635808. Its totient is φ = 319131394567440.

The previous prime is 320154251601607. The next prime is 320154251601629. The reversal of 320154251601623 is 326106152451023.

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 320154251601623 - 2⁴ = 320154251601607 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 (320154251601629) 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, 511428516623 + ... + 511428517248.

It is an arithmetic number, because the mean of its divisors is an integer number (80294277158952).

Almost surely, 2^{320154251601623} is an apocalyptic number.

320154251601623 is a deficient number, since it is larger than the sum of its proper divisors (1022857034185).

320154251601623 is a wasteful number, since it uses less digits than its factorization.

320154251601623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022857034184.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 320154251601623 in words is "three hundred twenty trillion, one hundred fifty-four billion, two hundred fifty-one million, six hundred one thousand, six hundred twenty-three".