32945564021 has 6 divisors (see below), whose sum is σ = 34440259350. Its totient is φ = 31513147688.

The previous prime is 32945563997. The next prime is 32945564023. The reversal of 32945564021 is 12046554923.

It can be written as a sum of positive squares in only one way, i.e., 27920739025 + 5024824996 = 167095^2 + 70886^2 .

It is a de Polignac number, because none of the positive numbers 2^k-32945564021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 32945564021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32945564023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31138946 + ... + 31140003.

It is an arithmetic number, because the mean of its divisors is an integer number (5740043225).

Almost surely, 2^32945564021 is an apocalyptic number.

It is an amenable number.

32945564021 is a deficient number, since it is larger than the sum of its proper divisors (1494695329).

32945564021 is an equidigital number, since it uses as much as digits as its factorization.

32945564021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62278995 (or 62278972 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 32945564021 in words is "thirty-two billion, nine hundred forty-five million, five hundred sixty-four thousand, twenty-one".