67720043519 has 16 divisors (see below), whose sum is σ = 69841989888. Its totient is φ = 65623545792.

The previous prime is 67720043497. The next prime is 67720043543. The reversal of 67720043519 is 91534002776.

It is a cyclic number.

It is not a de Polignac number, because 67720043519 - 2²⁴ = 67703266303 is a prime.

It is a super-2 number, since 2×67720043519² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67720043519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67720043579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18772814 + ... + 18776420.

It is an arithmetic number, because the mean of its divisors is an integer number (4365124368).

Almost surely, 2^67720043519 is an apocalyptic number.

67720043519 is a deficient number, since it is larger than the sum of its proper divisors (2121946369).

67720043519 is a wasteful number, since it uses less digits than its factorization.

67720043519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6974.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 67720043519 in words is "sixty-seven billion, seven hundred twenty million, forty-three thousand, five hundred nineteen".