652664532021 has 4 divisors (see below), whose sum is σ = 870219376032. Its totient is φ = 435109688012.

The previous prime is 652664532001. The next prime is 652664532031. The reversal of 652664532021 is 120235466256.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 652664532021 - 2⁵ = 652664531989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (652664532001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108777422001 + ... + 108777422006.

It is an arithmetic number, because the mean of its divisors is an integer number (217554844008).

Almost surely, 2^652664532021 is an apocalyptic number.

It is an amenable number.

652664532021 is a deficient number, since it is larger than the sum of its proper divisors (217554844011).

652664532021 is a wasteful number, since it uses less digits than its factorization.

652664532021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217554844010.

The product of its (nonzero) digits is 518400, while the sum is 42.

Adding to 652664532021 its reverse (120235466256), we get a palindrome (772899998277).

The spelling of 652664532021 in words is "six hundred fifty-two billion, six hundred sixty-four million, five hundred thirty-two thousand, twenty-one".