64356271957 has 2 divisors, whose sum is σ = 64356271958. Its totient is φ = 64356271956.

The previous prime is 64356271949. The next prime is 64356272039. The reversal of 64356271957 is 75917265346.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35010526321 + 29345745636 = 187111^2 + 171306^2 .

It is a cyclic number.

It is not a de Polignac number, because 64356271957 - 2³ = 64356271949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64356271898 and 64356271907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64356271657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32178135978 + 32178135979.

It is an arithmetic number, because the mean of its divisors is an integer number (32178135979).

Almost surely, 2^64356271957 is an apocalyptic number.

It is an amenable number.

64356271957 is a deficient number, since it is larger than the sum of its proper divisors (1).

64356271957 is an equidigital number, since it uses as much as digits as its factorization.

64356271957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9525600, while the sum is 55.

The spelling of 64356271957 in words is "sixty-four billion, three hundred fifty-six million, two hundred seventy-one thousand, nine hundred fifty-seven".