64810749350671 has 4 divisors (see below), whose sum is σ = 65017812447952. Its totient is φ = 64603686253392.

The previous prime is 64810749350609. The next prime is 64810749350701. The reversal of 64810749350671 is 17605394701846.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 64810749350671 - 2¹¹ = 64810749348623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64810729350671) 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, 103531548171 + ... + 103531548796.

It is an arithmetic number, because the mean of its divisors is an integer number (16254453111988).

Almost surely, 2^{64810749350671} is an apocalyptic number.

64810749350671 is a deficient number, since it is larger than the sum of its proper divisors (207063097281).

64810749350671 is a wasteful number, since it uses less digits than its factorization.

64810749350671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207063097280.

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 64810749350671 in words is "sixty-four trillion, eight hundred ten billion, seven hundred forty-nine million, three hundred fifty thousand, six hundred seventy-one".