207878631069 has 4 divisors (see below), whose sum is σ = 277171508096. Its totient is φ = 138585754044.

The previous prime is 207878631061. The next prime is 207878631137. The reversal of 207878631069 is 960136878702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 207878631069 - 2³ = 207878631061 is a prime.

It is a super-2 number, since 2×207878631069² (a number of 23 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 (207878631061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34646438509 + ... + 34646438514.

It is an arithmetic number, because the mean of its divisors is an integer number (69292877024).

Almost surely, 2^207878631069 is an apocalyptic number.

It is an amenable number.

207878631069 is a deficient number, since it is larger than the sum of its proper divisors (69292877027).

207878631069 is an equidigital number, since it uses as much as digits as its factorization.

207878631069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69292877026.

The product of its (nonzero) digits is 6096384, while the sum is 57.

The spelling of 207878631069 in words is "two hundred seven billion, eight hundred seventy-eight million, six hundred thirty-one thousand, sixty-nine".