64510041997 has 2 divisors, whose sum is σ = 64510041998. Its totient is φ = 64510041996.

The previous prime is 64510041991. The next prime is 64510042031. The reversal of 64510041997 is 79914001546.

64510041997 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., 33980866921 + 30529175076 = 184339^2 + 174726^2 .

It is a cyclic number.

It is not a de Polignac number, because 64510041997 - 2²⁷ = 64375824269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64510041991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32255020998 + 32255020999.

It is an arithmetic number, because the mean of its divisors is an integer number (32255020999).

Almost surely, 2^64510041997 is an apocalyptic number.

It is an amenable number.

64510041997 is a deficient number, since it is larger than the sum of its proper divisors (1).

64510041997 is an equidigital number, since it uses as much as digits as its factorization.

64510041997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 64510041997 in words is "sixty-four billion, five hundred ten million, forty-one thousand, nine hundred ninety-seven".