652437009421 has 16 divisors (see below), whose sum is σ = 693190252080. Its totient is φ = 611948712960.

The previous prime is 652437009407. The next prime is 652437009437. The reversal of 652437009421 is 124900734256.

It can be written as a sum of positive squares in 8 ways, for example, as 133188502500 + 519248506921 = 364950^2 + 720589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-652437009421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (652437009461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21654115 + ... + 21684223.

It is an arithmetic number, because the mean of its divisors is an integer number (43324390755).

Almost surely, 2^652437009421 is an apocalyptic number.

It is an amenable number.

652437009421 is a deficient number, since it is larger than the sum of its proper divisors (40753242659).

652437009421 is a wasteful number, since it uses less digits than its factorization.

652437009421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34464.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 652437009421 in words is "six hundred fifty-two billion, four hundred thirty-seven million, nine thousand, four hundred twenty-one".