67736040820 has 72 divisors (see below), whose sum is σ = 174178438560. Its totient is φ = 22001474880.

The previous prime is 67736040817. The next prime is 67736040857. The reversal of 67736040820 is 2804063776.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1800286 + ... + 1837525.

It is an arithmetic number, because the mean of its divisors is an integer number (2419144980).

Almost surely, 2^67736040820 is an apocalyptic number.

It is an amenable number.

67736040820 is an abundant number, since it is smaller than the sum of its proper divisors (106442397740).

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

67736040820 is a wasteful number, since it uses less digits than its factorization.

67736040820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637853 (or 3637844 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 67736040820 in words is "sixty-seven billion, seven hundred thirty-six million, forty thousand, eight hundred twenty".