64267677643 has 16 divisors (see below), whose sum is σ = 69533210880. Its totient is φ = 59048770176.

The previous prime is 64267677641. The next prime is 64267677667. The reversal of 64267677643 is 34677676246.

It is a cyclic number.

It is not a de Polignac number, because 64267677643 - 2¹ = 64267677641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64267677641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2459121 + ... + 2485117.

It is an arithmetic number, because the mean of its divisors is an integer number (4345825680).

Almost surely, 2^64267677643 is an apocalyptic number.

64267677643 is a deficient number, since it is larger than the sum of its proper divisors (5265533237).

64267677643 is a wasteful number, since it uses less digits than its factorization.

64267677643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26886.

The product of its digits is 42674688, while the sum is 58.

The spelling of 64267677643 in words is "sixty-four billion, two hundred sixty-seven million, six hundred seventy-seven thousand, six hundred forty-three".