64215412997 has 2 divisors, whose sum is σ = 64215412998. Its totient is φ = 64215412996.

The previous prime is 64215412981. The next prime is 64215413099. The reversal of 64215412997 is 79921451246.

64215412997 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., 32902694881 + 31312718116 = 181391^2 + 176954^2 .

It is a cyclic number.

It is not a de Polignac number, because 64215412997 - 2⁴ = 64215412981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64215412957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32107706498 + 32107706499.

It is an arithmetic number, because the mean of its divisors is an integer number (32107706499).

Almost surely, 2^64215412997 is an apocalyptic number.

It is an amenable number.

64215412997 is a deficient number, since it is larger than the sum of its proper divisors (1).

64215412997 is an equidigital number, since it uses as much as digits as its factorization.

64215412997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 50.

The spelling of 64215412997 in words is "sixty-four billion, two hundred fifteen million, four hundred twelve thousand, nine hundred ninety-seven".