68991022633 has 8 divisors (see below), whose sum is σ = 78668496648. Its totient is φ = 59937901824.

The previous prime is 68991022603. The next prime is 68991022657. The reversal of 68991022633 is 33622019986.

It can be written as a sum of positive squares in 4 ways, for example, as 23644597824 + 45346424809 = 153768^2 + 212947^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68991022633 - 2⁵ = 68991022601 is a prime.

It is a super-2 number, since 2×68991022633² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68991022603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156088066 + ... + 156088507.

It is an arithmetic number, because the mean of its divisors is an integer number (9833562081).

Almost surely, 2^68991022633 is an apocalyptic number.

It is an amenable number.

68991022633 is a deficient number, since it is larger than the sum of its proper divisors (9677474015).

68991022633 is a wasteful number, since it uses less digits than its factorization.

68991022633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312176603.

The product of its (nonzero) digits is 839808, while the sum is 49.

The spelling of 68991022633 in words is "sixty-eight billion, nine hundred ninety-one million, twenty-two thousand, six hundred thirty-three".