64774972443 has 6 divisors (see below), whose sum is σ = 86367217692. Its totient is φ = 43183021080.

The previous prime is 64774972439. The next prime is 64774972453. The reversal of 64774972443 is 34427947746.

64774972443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64774972443 - 2² = 64774972439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64774972453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 367353 + ... + 514293.

It is an arithmetic number, because the mean of its divisors is an integer number (14394536282).

Almost surely, 2^64774972443 is an apocalyptic number.

64774972443 is a deficient number, since it is larger than the sum of its proper divisors (21592245249).

64774972443 is an frugal number, since it uses more digits than its factorization.

64774972443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293885 (or 146944 counting only the distinct ones).

The product of its digits is 28449792, while the sum is 57.

The spelling of 64774972443 in words is "sixty-four billion, seven hundred seventy-four million, nine hundred seventy-two thousand, four hundred forty-three".