69808506366991 has 16 divisors (see below), whose sum is σ = 83397200650240. Its totient is φ = 57172690261440.

The previous prime is 69808506366943. The next prime is 69808506367069. The reversal of 69808506366991 is 19966360580896.

It is a cyclic number.

It is not a de Polignac number, because 69808506366991 - 2¹⁵ = 69808506334223 is a prime.

It is a super-2 number, since 2×69808506366991² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69808506369991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2036047326 + ... + 2036081611.

It is an arithmetic number, because the mean of its divisors is an integer number (5212325040640).

Almost surely, 2^{69808506366991} is an apocalyptic number.

69808506366991 is a deficient number, since it is larger than the sum of its proper divisors (13588694283249).

69808506366991 is a wasteful number, since it uses less digits than its factorization.

69808506366991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4072129054.

The product of its (nonzero) digits is 906992640, while the sum is 76.

The spelling of 69808506366991 in words is "sixty-nine trillion, eight hundred eight billion, five hundred six million, three hundred sixty-six thousand, nine hundred ninety-one".