67612793940 has 36 divisors (see below), whose sum is σ = 205092142164. Its totient is φ = 18030078336.

The previous prime is 67612793923. The next prime is 67612793953. The reversal of 67612793940 is 4939721676.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19206633744 + 48406160196 = 138588^2 + 220014^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187813137 + ... + 187813496.

It is an arithmetic number, because the mean of its divisors is an integer number (5697003949).

Almost surely, 2^67612793940 is an apocalyptic number.

67612793940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67612793940 is an abundant number, since it is smaller than the sum of its proper divisors (137479348224).

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

67612793940 is a wasteful number, since it uses less digits than its factorization.

67612793940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375626648 (or 375626643 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The spelling of 67612793940 in words is "sixty-seven billion, six hundred twelve million, seven hundred ninety-three thousand, nine hundred forty".