67140721042312 has 8 divisors (see below), whose sum is σ = 125888851954350. Its totient is φ = 33570360521152.

The previous prime is 67140721042273. The next prime is 67140721042313. The reversal of 67140721042312 is 21324012704176.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 35820871382916 + 31319849659396 = 5985054^2 + 5596414^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (67140721042313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4196295065137 + ... + 4196295065152.

Almost surely, 2^{67140721042312} is an apocalyptic number.

It is an amenable number.

67140721042312 is a deficient number, since it is larger than the sum of its proper divisors (58748130912038).

67140721042312 is a wasteful number, since it uses less digits than its factorization.

67140721042312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8392590130295 (or 8392590130291 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

Adding to 67140721042312 its reverse (21324012704176), we get a palindrome (88464733746488).

The spelling of 67140721042312 in words is "sixty-seven trillion, one hundred forty billion, seven hundred twenty-one million, forty-two thousand, three hundred twelve".