64494591739 has 2 divisors, whose sum is σ = 64494591740. Its totient is φ = 64494591738.

The previous prime is 64494591631. The next prime is 64494591757. The reversal of 64494591739 is 93719549446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64494591739 - 2²¹ = 64492494587 is a prime.

It is not a weakly prime, because it can be changed into another prime (64494591769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32247295869 + 32247295870.

It is an arithmetic number, because the mean of its divisors is an integer number (32247295870).

Almost surely, 2^64494591739 is an apocalyptic number.

64494591739 is a deficient number, since it is larger than the sum of its proper divisors (1).

64494591739 is an equidigital number, since it uses as much as digits as its factorization.

64494591739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29393280, while the sum is 61.

The spelling of 64494591739 in words is "sixty-four billion, four hundred ninety-four million, five hundred ninety-one thousand, seven hundred thirty-nine".