67140721042440 has 64 divisors (see below), whose sum is σ = 201426452136000. Its totient is φ = 17903811032832.

The previous prime is 67140721042429. The next prime is 67140721042441. The reversal of 67140721042440 is 4424012704176.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 67140721042392 and 67140721042401.

It is not an unprimeable number, because it can be changed into a prime (67140721042441) 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, 275502 + ... + 11591261.

It is an arithmetic number, because the mean of its divisors is an integer number (3147288314625).

Almost surely, 2^{67140721042440} is an apocalyptic number.

67140721042440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67140721042440 is an abundant number, since it is smaller than the sum of its proper divisors (134285731093560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67140721042440 is a wasteful number, since it uses less digits than its factorization.

67140721042440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11913926 (or 11913922 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 42.

The spelling of 67140721042440 in words is "sixty-seven trillion, one hundred forty billion, seven hundred twenty-one million, forty-two thousand, four hundred forty".