64738745443 has 2 divisors, whose sum is σ = 64738745444. Its totient is φ = 64738745442.

The previous prime is 64738745441. The next prime is 64738745453. The reversal of 64738745443 is 34454783746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64738745443 - 2¹ = 64738745441 is a prime.

It is a super-4 number, since 4×64738745443⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 64738745441, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64738745441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32369372721 + 32369372722.

It is an arithmetic number, because the mean of its divisors is an integer number (32369372722).

Almost surely, 2^64738745443 is an apocalyptic number.

64738745443 is a deficient number, since it is larger than the sum of its proper divisors (1).

64738745443 is an equidigital number, since it uses as much as digits as its factorization.

64738745443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27095040, while the sum is 55.

The spelling of 64738745443 in words is "sixty-four billion, seven hundred thirty-eight million, seven hundred forty-five thousand, four hundred forty-three".