68690556869 has 16 divisors (see below), whose sum is σ = 77305643520. Its totient is φ = 60485693760.

The previous prime is 68690556841. The next prime is 68690556877. The reversal of 68690556869 is 96865509686.

It is a de Polignac number, because none of the positive numbers 2^k-68690556869 is a prime.

It is a super-2 number, since 2×68690556869² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68690556799 and 68690556808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68690556889) 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, 287654 + ... + 469175.

It is an arithmetic number, because the mean of its divisors is an integer number (4831602720).

Almost surely, 2^68690556869 is an apocalyptic number.

It is an amenable number.

68690556869 is a deficient number, since it is larger than the sum of its proper divisors (8615086651).

68690556869 is a wasteful number, since it uses less digits than its factorization.

68690556869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757100.

The product of its (nonzero) digits is 167961600, while the sum is 68.

The spelling of 68690556869 in words is "sixty-eight billion, six hundred ninety million, five hundred fifty-six thousand, eight hundred sixty-nine".