652045146821 has 2 divisors, whose sum is σ = 652045146822. Its totient is φ = 652045146820.

The previous prime is 652045146769. The next prime is 652045146833. The reversal of 652045146821 is 128641540256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 483546390625 + 168498756196 = 695375^2 + 410486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-652045146821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (652045146521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326022573410 + 326022573411.

It is an arithmetic number, because the mean of its divisors is an integer number (326022573411).

Almost surely, 2^652045146821 is an apocalyptic number.

It is an amenable number.

652045146821 is a deficient number, since it is larger than the sum of its proper divisors (1).

652045146821 is an equidigital number, since it uses as much as digits as its factorization.

652045146821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 460800, while the sum is 44.

The spelling of 652045146821 in words is "six hundred fifty-two billion, forty-five million, one hundred forty-six thousand, eight hundred twenty-one".