67923779155 has 32 divisors (see below), whose sum is σ = 89179372800. Its totient is φ = 49484068992.

The previous prime is 67923779137. The next prime is 67923779179. The reversal of 67923779155 is 55197732976.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 67923779155 - 2²³ = 67915390547 is a prime.

It is a super-2 number, since 2×67923779155² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 67923779093 and 67923779102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175336 + ... + 408154.

It is an arithmetic number, because the mean of its divisors is an integer number (2786855400).

Almost surely, 2^67923779155 is an apocalyptic number.

67923779155 is a deficient number, since it is larger than the sum of its proper divisors (21255593645).

67923779155 is a wasteful number, since it uses less digits than its factorization.

67923779155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232963.

The product of its digits is 25004700, while the sum is 61.

The spelling of 67923779155 in words is "sixty-seven billion, nine hundred twenty-three million, seven hundred seventy-nine thousand, one hundred fifty-five".