67791971353744 has 45 divisors (see below), whose sum is σ = 144373859282611. Its totient is φ = 30814367761760.

The previous prime is 67791971353721. The next prime is 67791971353751. The reversal of 67791971353744 is 44735317919776.

The square root of 67791971353744 is 8233588.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 362184309 + ... + 362371435.

Almost surely, 2^{67791971353744} is an apocalyptic number.

67791971353744 is the 8233588-th square number.

It is an amenable number.

67791971353744 is an abundant number, since it is smaller than the sum of its proper divisors (76581887928867).

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

67791971353744 is an frugal number, since it uses more digits than its factorization.

67791971353744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374284 (or 187140 counting only the distinct ones).

The product of its digits is 840157920, while the sum is 73.

The spelling of 67791971353744 in words is "sixty-seven trillion, seven hundred ninety-one billion, nine hundred seventy-one million, three hundred fifty-three thousand, seven hundred forty-four".