64873139139 has 8 divisors (see below), whose sum is σ = 96108354320. Its totient is φ = 43248759408.

The previous prime is 64873139101. The next prime is 64873139143. The reversal of 64873139139 is 93193137846.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-64873139139 is a prime.

It is a super-2 number, since 2×64873139139² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64873139159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1201354402 + ... + 1201354455.

It is an arithmetic number, because the mean of its divisors is an integer number (12013544290).

Almost surely, 2^64873139139 is an apocalyptic number.

64873139139 is a deficient number, since it is larger than the sum of its proper divisors (31235215181).

64873139139 is a wasteful number, since it uses less digits than its factorization.

64873139139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402708866 (or 2402708860 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The spelling of 64873139139 in words is "sixty-four billion, eight hundred seventy-three million, one hundred thirty-nine thousand, one hundred thirty-nine".