64433564635081 has 2 divisors, whose sum is σ = 64433564635082. Its totient is φ = 64433564635080.

The previous prime is 64433564634983. The next prime is 64433564635087. The reversal of 64433564635081 is 18053646533446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58575756110400 + 5857808524681 = 7653480^2 + 2420291^2 .

It is a cyclic number.

It is not a de Polignac number, because 64433564635081 - 2¹⁷ = 64433564504009 is a prime.

It is a super-2 number, since 2×64433564635081² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64433564635087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32216782317540 + 32216782317541.

It is an arithmetic number, because the mean of its divisors is an integer number (32216782317541).

Almost surely, 2^{64433564635081} is an apocalyptic number.

It is an amenable number.

64433564635081 is a deficient number, since it is larger than the sum of its proper divisors (1).

64433564635081 is an equidigital number, since it uses as much as digits as its factorization.

64433564635081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 74649600, while the sum is 58.

The spelling of 64433564635081 in words is "sixty-four trillion, four hundred thirty-three billion, five hundred sixty-four million, six hundred thirty-five thousand, eighty-one".