67140721042439 has 32 divisors (see below), whose sum is σ = 78551317693440. Its totient is φ = 56707360819200.

The previous prime is 67140721042429. The next prime is 67140721042441. The reversal of 67140721042439 is 93424012704176.

It is a cyclic number.

It is not a de Polignac number, because 67140721042439 - 2¹² = 67140721038343 is a prime.

It is a super-2 number, since 2×67140721042439² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67140721042429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69261992 + ... + 70224674.

It is an arithmetic number, because the mean of its divisors is an integer number (2454728677920).

Almost surely, 2^{67140721042439} is an apocalyptic number.

67140721042439 is a deficient number, since it is larger than the sum of its proper divisors (11410596651001).

67140721042439 is a wasteful number, since it uses less digits than its factorization.

67140721042439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967511.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 67140721042439 in words is "sixty-seven trillion, one hundred forty billion, seven hundred twenty-one million, forty-two thousand, four hundred thirty-nine".