64276772243 has 4 divisors (see below), whose sum is σ = 64300696320. Its totient is φ = 64252848168.

The previous prime is 64276772237. The next prime is 64276772327. The reversal of 64276772243 is 34227767246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64276772243 is a prime.

It is a super-4 number, since 4×64276772243⁴ (a number of 44 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64276772191 and 64276772200.

It is not an unprimeable number, because it can be changed into a prime (64276772143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11958008 + ... + 11963381.

It is an arithmetic number, because the mean of its divisors is an integer number (16075174080).

Almost surely, 2^64276772243 is an apocalyptic number.

64276772243 is a deficient number, since it is larger than the sum of its proper divisors (23924077).

64276772243 is a wasteful number, since it uses less digits than its factorization.

64276772243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23924076.

The product of its digits is 4741632, while the sum is 50.

The spelling of 64276772243 in words is "sixty-four billion, two hundred seventy-six million, seven hundred seventy-two thousand, two hundred forty-three".