67616121849 has 4 divisors (see below), whose sum is σ = 90154829136. Its totient is φ = 45077414564.

The previous prime is 67616121841. The next prime is 67616121863. The reversal of 67616121849 is 94812161676.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67616121849 - 2³ = 67616121841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67616121841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11269353639 + ... + 11269353644.

It is an arithmetic number, because the mean of its divisors is an integer number (22538707284).

Almost surely, 2^67616121849 is an apocalyptic number.

It is an amenable number.

67616121849 is a deficient number, since it is larger than the sum of its proper divisors (22538707287).

67616121849 is a wasteful number, since it uses less digits than its factorization.

67616121849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22538707286.

The product of its digits is 870912, while the sum is 51.

The spelling of 67616121849 in words is "sixty-seven billion, six hundred sixteen million, one hundred twenty-one thousand, eight hundred forty-nine".