64536801555923 has 2 divisors, whose sum is σ = 64536801555924. Its totient is φ = 64536801555922.

The previous prime is 64536801555761. The next prime is 64536801555959. The reversal of 64536801555923 is 32955510863546.

It is a happy number.

64536801555923 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 is a cyclic number.

It is not a de Polignac number, because 64536801555923 - 2¹⁸ = 64536801293779 is a prime.

It is not a weakly prime, because it can be changed into another prime (64536801555323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32268400777961 + 32268400777962.

It is an arithmetic number, because the mean of its divisors is an integer number (32268400777962).

Almost surely, 2^{64536801555923} is an apocalyptic number.

64536801555923 is a deficient number, since it is larger than the sum of its proper divisors (1).

64536801555923 is an equidigital number, since it uses as much as digits as its factorization.

64536801555923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640000, while the sum is 62.

The spelling of 64536801555923 in words is "sixty-four trillion, five hundred thirty-six billion, eight hundred one million, five hundred fifty-five thousand, nine hundred twenty-three".