67838956779 has 16 divisors (see below), whose sum is σ = 99395107200. Its totient is φ = 40814410560.

The previous prime is 67838956747. The next prime is 67838956789. The reversal of 67838956779 is 97765983876.

It is not a de Polignac number, because 67838956779 - 2⁵ = 67838956747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67838956779.

It is not an unprimeable number, because it can be changed into a prime (67838956789) 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, 7498129 + ... + 7507170.

It is an arithmetic number, because the mean of its divisors is an integer number (6212194200).

Almost surely, 2^67838956779 is an apocalyptic number.

67838956779 is a deficient number, since it is larger than the sum of its proper divisors (31556150421).

67838956779 is a wasteful number, since it uses less digits than its factorization.

67838956779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15005450.

The product of its digits is 960180480, while the sum is 75.

The spelling of 67838956779 in words is "sixty-seven billion, eight hundred thirty-eight million, nine hundred fifty-six thousand, seven hundred seventy-nine".