67999628991 has 64 divisors (see below), whose sum is σ = 106467250176. Its totient is φ = 37805875200.

The previous prime is 67999628987. The next prime is 67999628993. The reversal of 67999628991 is 19982699976.

It is not a de Polignac number, because 67999628991 - 2² = 67999628987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67999628993) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 64089601 + ... + 64090661.

It is an arithmetic number, because the mean of its divisors is an integer number (1663550784).

Almost surely, 2^67999628991 is an apocalyptic number.

67999628991 is a deficient number, since it is larger than the sum of its proper divisors (38467621185).

67999628991 is a wasteful number, since it uses less digits than its factorization.

67999628991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672.

The product of its digits is 238085568, while the sum is 75.

The spelling of 67999628991 in words is "sixty-seven billion, nine hundred ninety-nine million, six hundred twenty-eight thousand, nine hundred ninety-one".