464549633378221 has 2 divisors, whose sum is σ = 464549633378222. Its totient is φ = 464549633378220.

The previous prime is 464549633378197. The next prime is 464549633378339. The reversal of 464549633378221 is 122873336945464.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 397630918269225 + 66918715108996 = 19940685^2 + 8180386^2 .

It is a cyclic number.

It is not a de Polignac number, because 464549633378221 - 2¹⁷ = 464549633247149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (464549633378521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232274816689110 + 232274816689111.

It is an arithmetic number, because the mean of its divisors is an integer number (232274816689111).

Almost surely, 2^{464549633378221} is an apocalyptic number.

It is an amenable number.

464549633378221 is a deficient number, since it is larger than the sum of its proper divisors (1).

464549633378221 is an equidigital number, since it uses as much as digits as its factorization.

464549633378221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 627056640, while the sum is 67.

The spelling of 464549633378221 in words is "four hundred sixty-four trillion, five hundred forty-nine billion, six hundred thirty-three million, three hundred seventy-eight thousand, two hundred twenty-one".