67491939904 has 28 divisors (see below), whose sum is σ = 141807515724. Its totient is φ = 31760912384.

The previous prime is 67491939901. The next prime is 67491939947. The reversal of 67491939904 is 40993919476.

67491939904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 19376640000 + 48115299904 = 139200^2 + 219352^2 .

It is not an unprimeable number, because it can be changed into a prime (67491939901) 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, 31015429 + ... + 31017604.

It is an arithmetic number, because the mean of its divisors is an integer number (5064554133).

Almost surely, 2^67491939904 is an apocalyptic number.

67491939904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

67491939904 is an abundant number, since it is smaller than the sum of its proper divisors (74315575820).

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

67491939904 is a wasteful number, since it uses less digits than its factorization.

67491939904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62033062 (or 62033052 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 61.

The spelling of 67491939904 in words is "sixty-seven billion, four hundred ninety-one million, nine hundred thirty-nine thousand, nine hundred four".