64623102211621 has 2 divisors, whose sum is σ = 64623102211622. Its totient is φ = 64623102211620.

The previous prime is 64623102211609. The next prime is 64623102211637. The reversal of 64623102211621 is 12611220132646.

64623102211621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52025493636900 + 12597608574721 = 7212870^2 + 3549311^2 .

It is a cyclic number.

It is not a de Polignac number, because 64623102211621 - 2³⁵ = 64588742473253 is a prime.

It is a super-2 number, since 2×64623102211621² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64623102211021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32311551105810 + 32311551105811.

It is an arithmetic number, because the mean of its divisors is an integer number (32311551105811).

Almost surely, 2^{64623102211621} is an apocalyptic number.

It is an amenable number.

64623102211621 is a deficient number, since it is larger than the sum of its proper divisors (1).

64623102211621 is an equidigital number, since it uses as much as digits as its factorization.

64623102211621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 64623102211621 in words is "sixty-four trillion, six hundred twenty-three billion, one hundred two million, two hundred eleven thousand, six hundred twenty-one".