320155206251078 has 16 divisors (see below), whose sum is σ = 530521860764160. Its totient is φ = 143683003955400.

The previous prime is 320155206251021. The next prime is 320155206251081. The reversal of 320155206251078 is 870152602551023.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92104487978 + ... + 92104491453.

It is an arithmetic number, because the mean of its divisors is an integer number (33157616297760).

Almost surely, 2^{320155206251078} is an apocalyptic number.

320155206251078 is a deficient number, since it is larger than the sum of its proper divisors (210366654513082).

320155206251078 is a wasteful number, since it uses less digits than its factorization.

320155206251078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184208979523.

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 320155206251078 in words is "three hundred twenty trillion, one hundred fifty-five billion, two hundred six million, two hundred fifty-one thousand, seventy-eight".