68909809969 has 16 divisors (see below), whose sum is σ = 92522263680. Its totient is φ = 49565496960.

The previous prime is 68909809967. The next prime is 68909810051. The reversal of 68909809969 is 96990890986.

It is not a de Polignac number, because 68909809969 - 2¹ = 68909809967 is a prime.

It is a super-2 number, since 2×68909809969² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68909809967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34419484 + ... + 34421485.

It is an arithmetic number, because the mean of its divisors is an integer number (5782641480).

Almost surely, 2^68909809969 is an apocalyptic number.

It is an amenable number.

68909809969 is a deficient number, since it is larger than the sum of its proper divisors (23612453711).

68909809969 is a wasteful number, since it uses less digits than its factorization.

68909809969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68841000.

The product of its (nonzero) digits is 136048896, while the sum is 73.

It can be divided in two parts, 68909 and 809969, that added together give a palindrome (878878).

The spelling of 68909809969 in words is "sixty-eight billion, nine hundred nine million, eight hundred nine thousand, nine hundred sixty-nine".