320154772655 has 16 divisors (see below), whose sum is σ = 385945081344. Its totient is φ = 254952284160.

The previous prime is 320154772603. The next prime is 320154772669. The reversal of 320154772655 is 556277451023.

It is not a de Polignac number, because 320154772655 - 2¹² = 320154768559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1805549 + ... + 1974921.

It is an arithmetic number, because the mean of its divisors is an integer number (24121567584).

Almost surely, 2^320154772655 is an apocalyptic number.

320154772655 is a deficient number, since it is larger than the sum of its proper divisors (65790308689).

320154772655 is a wasteful number, since it uses less digits than its factorization.

320154772655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171106.

The product of its (nonzero) digits is 1764000, while the sum is 47.

The spelling of 320154772655 in words is "three hundred twenty billion, one hundred fifty-four million, seven hundred seventy-two thousand, six hundred fifty-five".