67121484639 has 16 divisors (see below), whose sum is σ = 97650393600. Its totient is φ = 40671711360.

The previous prime is 67121484613. The next prime is 67121484751. The reversal of 67121484639 is 93648412176.

It is a happy number.

67121484639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 67121484639 - 2⁹ = 67121484127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67121484591 and 67121484600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67121484839) 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, 26314 + ... + 367335.

It is an arithmetic number, because the mean of its divisors is an integer number (6103149600).

Almost surely, 2^67121484639 is an apocalyptic number.

67121484639 is a deficient number, since it is larger than the sum of its proper divisors (30528908961).

67121484639 is a wasteful number, since it uses less digits than its factorization.

67121484639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398830.

The product of its digits is 1741824, while the sum is 51.

The spelling of 67121484639 in words is "sixty-seven billion, one hundred twenty-one million, four hundred eighty-four thousand, six hundred thirty-nine".