320426686055 has 32 divisors (see below), whose sum is σ = 449685540864. Its totient is φ = 214618156416.

The previous prime is 320426686051. The next prime is 320426686133. The reversal of 320426686055 is 550686624023.

It is a cyclic number.

It is not a de Polignac number, because 320426686055 - 2² = 320426686051 is a prime.

It is a super-2 number, since 2×320426686055² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320426686051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 633809 + ... + 1021061.

It is an arithmetic number, because the mean of its divisors is an integer number (14052673152).

Almost surely, 2^320426686055 is an apocalyptic number.

320426686055 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

320426686055 is a deficient number, since it is larger than the sum of its proper divisors (129258854809).

320426686055 is a wasteful number, since it uses less digits than its factorization.

320426686055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387815.

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 320426686055 in words is "three hundred twenty billion, four hundred twenty-six million, six hundred eighty-six thousand, fifty-five".