64172877931073 has 2 divisors, whose sum is σ = 64172877931074. Its totient is φ = 64172877931072.

The previous prime is 64172877931049. The next prime is 64172877931091. The reversal of 64172877931073 is 37013977827146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63233397475249 + 939480455824 = 7951943^2 + 969268^2 .

It is a cyclic number.

It is not a de Polignac number, because 64172877931073 - 2¹⁸ = 64172877668929 is a prime.

It is not a weakly prime, because it can be changed into another prime (64172877921073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32086438965536 + 32086438965537.

It is an arithmetic number, because the mean of its divisors is an integer number (32086438965537).

Almost surely, 2^{64172877931073} is an apocalyptic number.

It is an amenable number.

64172877931073 is a deficient number, since it is larger than the sum of its proper divisors (1).

64172877931073 is an equidigital number, since it uses as much as digits as its factorization.

64172877931073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74680704, while the sum is 65.

The spelling of 64172877931073 in words is "sixty-four trillion, one hundred seventy-two billion, eight hundred seventy-seven million, nine hundred thirty-one thousand, seventy-three".