64615264632643 has 4 divisors (see below), whose sum is σ = 64640319022440. Its totient is φ = 64590210242848.

The previous prime is 64615264632637. The next prime is 64615264632649. The reversal of 64615264632643 is 34623646251646.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (64615264632637) and next prime (64615264632649).

It is a cyclic number.

It is not a de Polignac number, because 64615264632643 - 2⁹ = 64615264632131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64615264632649) 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, 12527191030 + ... + 12527196187.

It is an arithmetic number, because the mean of its divisors is an integer number (16160079755610).

Almost surely, 2^{64615264632643} is an apocalyptic number.

64615264632643 is a deficient number, since it is larger than the sum of its proper divisors (25054389797).

64615264632643 is a wasteful number, since it uses less digits than its factorization.

64615264632643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25054389796.

The product of its digits is 89579520, while the sum is 58.

The spelling of 64615264632643 in words is "sixty-four trillion, six hundred fifteen billion, two hundred sixty-four million, six hundred thirty-two thousand, six hundred forty-three".