320561336670 has 32 divisors (see below), whose sum is σ = 790140378528. Its totient is φ = 83172670848.

The previous prime is 320561336581. The next prime is 320561336677. The reversal of 320561336670 is 76633165023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320561336677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144395889 + ... + 144398108.

It is an arithmetic number, because the mean of its divisors is an integer number (24691886829).

Almost surely, 2^320561336670 is an apocalyptic number.

320561336670 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

320561336670 is an abundant number, since it is smaller than the sum of its proper divisors (469579041858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320561336670 is a wasteful number, since it uses less digits than its factorization.

320561336670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288794044.

The product of its (nonzero) digits is 408240, while the sum is 42.

It can be divided in two parts, 320561 and 336670, that added together give a triangular number (657231 = T₁₁₄₆).

The spelling of 320561336670 in words is "three hundred twenty billion, five hundred sixty-one million, three hundred thirty-six thousand, six hundred seventy".