6581699136939 has 4 divisors (see below), whose sum is σ = 8775598849256. Its totient is φ = 4387799424624.

The previous prime is 6581699136913. The next prime is 6581699136941. The reversal of 6581699136939 is 9396319961856.

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

It is not a de Polignac number, because 6581699136939 - 2¹⁶ = 6581699071403 is a prime.

It is a super-3 number, since 3×6581699136939³ (a number of 39 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6581699136239) 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, 1096949856154 + ... + 1096949856159.

It is an arithmetic number, because the mean of its divisors is an integer number (2193899712314).

Almost surely, 2^{6581699136939} is an apocalyptic number.

6581699136939 is a deficient number, since it is larger than the sum of its proper divisors (2193899712317).

6581699136939 is a wasteful number, since it uses less digits than its factorization.

6581699136939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193899712316.

The product of its digits is 510183360, while the sum is 75.

The spelling of 6581699136939 in words is "six trillion, five hundred eighty-one billion, six hundred ninety-nine million, one hundred thirty-six thousand, nine hundred thirty-nine".