64380092561 has 2 divisors, whose sum is σ = 64380092562. Its totient is φ = 64380092560.

The previous prime is 64380092551. The next prime is 64380092563. The reversal of 64380092561 is 16529008346.

64380092561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41795713600 + 22584378961 = 204440^2 + 150281^2 .

It is a cyclic number.

It is not a de Polignac number, because 64380092561 - 2¹⁰ = 64380091537 is a prime.

Together with 64380092563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64380092563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32190046280 + 32190046281.

It is an arithmetic number, because the mean of its divisors is an integer number (32190046281).

Almost surely, 2^64380092561 is an apocalyptic number.

It is an amenable number.

64380092561 is a deficient number, since it is larger than the sum of its proper divisors (1).

64380092561 is an equidigital number, since it uses as much as digits as its factorization.

64380092561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 64380092561 in words is "sixty-four billion, three hundred eighty million, ninety-two thousand, five hundred sixty-one".