64815476458157 has 2 divisors, whose sum is σ = 64815476458158. Its totient is φ = 64815476458156.

The previous prime is 64815476458133. The next prime is 64815476458163. The reversal of 64815476458157 is 75185467451846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63030436167241 + 1785040290916 = 7939171^2 + 1336054^2 .

It is a cyclic number.

It is not a de Polignac number, because 64815476458157 - 2¹⁰ = 64815476457133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64815476158157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32407738229078 + 32407738229079.

It is an arithmetic number, because the mean of its divisors is an integer number (32407738229079).

Almost surely, 2^{64815476458157} is an apocalyptic number.

It is an amenable number.

64815476458157 is a deficient number, since it is larger than the sum of its proper divisors (1).

64815476458157 is an equidigital number, since it uses as much as digits as its factorization.

64815476458157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168000, while the sum is 71.

The spelling of 64815476458157 in words is "sixty-four trillion, eight hundred fifteen billion, four hundred seventy-six million, four hundred fifty-eight thousand, one hundred fifty-seven".