69388806887 has 4 divisors (see below), whose sum is σ = 69699967680. Its totient is φ = 69077646096.

The previous prime is 69388806841. The next prime is 69388806889. The reversal of 69388806887 is 78860888396.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69388806887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 69388806887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69388806889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155580062 + ... + 155580507.

It is an arithmetic number, because the mean of its divisors is an integer number (17424991920).

Almost surely, 2^69388806887 is an apocalyptic number.

69388806887 is a deficient number, since it is larger than the sum of its proper divisors (311160793).

69388806887 is a wasteful number, since it uses less digits than its factorization.

69388806887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311160792.

The product of its (nonzero) digits is 222953472, while the sum is 71.

The spelling of 69388806887 in words is "sixty-nine billion, three hundred eighty-eight million, eight hundred six thousand, eight hundred eighty-seven".