32420640365 has 4 divisors (see below), whose sum is σ = 38904768444. Its totient is φ = 25936512288.

The previous prime is 32420640359. The next prime is 32420640377. The reversal of 32420640365 is 56304602423.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56304602423 = 167483 ⋅336181.

It can be written as a sum of positive squares in 2 ways, for example, as 16442163529 + 15978476836 = 128227^2 + 126406^2 .

It is a cyclic number.

It is not a de Polignac number, because 32420640365 - 2³⁴ = 15240771181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3242064032 + ... + 3242064041.

It is an arithmetic number, because the mean of its divisors is an integer number (9726192111).

Almost surely, 2^32420640365 is an apocalyptic number.

It is an amenable number.

32420640365 is a deficient number, since it is larger than the sum of its proper divisors (6484128079).

32420640365 is an equidigital number, since it uses as much as digits as its factorization.

32420640365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6484128078.

The product of its (nonzero) digits is 103680, while the sum is 35.

The spelling of 32420640365 in words is "thirty-two billion, four hundred twenty million, six hundred forty thousand, three hundred sixty-five".