64275939697 has 2 divisors, whose sum is σ = 64275939698. Its totient is φ = 64275939696.

The previous prime is 64275939643. The next prime is 64275939731. The reversal of 64275939697 is 79693957246.

64275939697 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., 38135840656 + 26140099041 = 195284^2 + 161679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64275939697 is a prime.

It is not a weakly prime, because it can be changed into another prime (64275939197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32137969848 + 32137969849.

It is an arithmetic number, because the mean of its divisors is an integer number (32137969849).

Almost surely, 2^64275939697 is an apocalyptic number.

It is an amenable number.

64275939697 is a deficient number, since it is larger than the sum of its proper divisors (1).

64275939697 is an equidigital number, since it uses as much as digits as its factorization.

64275939697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 154314720, while the sum is 67.

The spelling of 64275939697 in words is "sixty-four billion, two hundred seventy-five million, nine hundred thirty-nine thousand, six hundred ninety-seven".