64126802687 has 4 divisors (see below), whose sum is σ = 64187130000. Its totient is φ = 64066475376.

The previous prime is 64126802659. The next prime is 64126802689. The reversal of 64126802687 is 78620862146.

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 64126802687 - 2¹⁴ = 64126786303 is a prime.

It is a super-2 number, since 2×64126802687² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64126802689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30162062 + ... + 30164187.

It is an arithmetic number, because the mean of its divisors is an integer number (16046782500).

Almost surely, 2^64126802687 is an apocalyptic number.

64126802687 is a deficient number, since it is larger than the sum of its proper divisors (60327313).

64126802687 is a wasteful number, since it uses less digits than its factorization.

64126802687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60327312.

The product of its (nonzero) digits is 1548288, while the sum is 50.

The spelling of 64126802687 in words is "sixty-four billion, one hundred twenty-six million, eight hundred two thousand, six hundred eighty-seven".