64602241621 has 2 divisors, whose sum is σ = 64602241622. Its totient is φ = 64602241620.

The previous prime is 64602241577. The next prime is 64602241631. The reversal of 64602241621 is 12614220646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64462671025 + 139570596 = 253895^2 + 11814^2 .

It is a cyclic number.

It is not a de Polignac number, because 64602241621 - 2⁷ = 64602241493 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64602241631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32301120810 + 32301120811.

It is an arithmetic number, because the mean of its divisors is an integer number (32301120811).

Almost surely, 2^64602241621 is an apocalyptic number.

It is an amenable number.

64602241621 is a deficient number, since it is larger than the sum of its proper divisors (1).

64602241621 is an equidigital number, since it uses as much as digits as its factorization.

64602241621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 34.

The spelling of 64602241621 in words is "sixty-four billion, six hundred two million, two hundred forty-one thousand, six hundred twenty-one".