67242629521 has 4 divisors (see below), whose sum is σ = 67247011044. Its totient is φ = 67238248000.

The previous prime is 67242629513. The next prime is 67242629537. The reversal of 67242629521 is 12592624276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54419558400 + 12823071121 = 233280^2 + 113239^2 .

It is a cyclic number.

It is not a de Polignac number, because 67242629521 - 2³ = 67242629513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67242629021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2167660 + ... + 2198461.

It is an arithmetic number, because the mean of its divisors is an integer number (16811752761).

Almost surely, 2^67242629521 is an apocalyptic number.

It is an amenable number.

67242629521 is a deficient number, since it is larger than the sum of its proper divisors (4381523).

67242629521 is a wasteful number, since it uses less digits than its factorization.

67242629521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4381522.

The product of its digits is 725760, while the sum is 46.

The spelling of 67242629521 in words is "sixty-seven billion, two hundred forty-two million, six hundred twenty-nine thousand, five hundred twenty-one".