139644765869 has 24 divisors (see below), whose sum is σ = 164540851200. Its totient is φ = 118158536160.

The previous prime is 139644765851. The next prime is 139644765893. The reversal of 139644765869 is 968567446931.

It is not a de Polignac number, because 139644765869 - 2¹⁶ = 139644700333 is a prime.

It is a super-2 number, since 2×139644765869² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139644765799 and 139644765808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139644765839) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1399172 + ... + 1495650.

It is an arithmetic number, because the mean of its divisors is an integer number (6855868800).

Almost surely, 2^139644765869 is an apocalyptic number.

It is an amenable number.

139644765869 is a deficient number, since it is larger than the sum of its proper divisors (24896085331).

139644765869 is a wasteful number, since it uses less digits than its factorization.

139644765869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96873 (or 96866 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 68.

The spelling of 139644765869 in words is "one hundred thirty-nine billion, six hundred forty-four million, seven hundred sixty-five thousand, eight hundred sixty-nine".