69683729861 has 4 divisors (see below), whose sum is σ = 73782772812. Its totient is φ = 65584686912.

The previous prime is 69683729837. The next prime is 69683729879. The reversal of 69683729861 is 16892738696.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62065756900 + 7617972961 = 249130^2 + 87281^2 .

It is a cyclic number.

It is not a de Polignac number, because 69683729861 - 2¹⁸ = 69683467717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69683729831) 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, 2049521450 + ... + 2049521483.

It is an arithmetic number, because the mean of its divisors is an integer number (18445693203).

Almost surely, 2^69683729861 is an apocalyptic number.

It is an amenable number.

69683729861 is a deficient number, since it is larger than the sum of its proper divisors (4099042951).

69683729861 is a wasteful number, since it uses less digits than its factorization.

69683729861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4099042950.

The product of its digits is 47029248, while the sum is 65.

The spelling of 69683729861 in words is "sixty-nine billion, six hundred eighty-three million, seven hundred twenty-nine thousand, eight hundred sixty-one".