67001769409 has 3 divisors (see below), whose sum is σ = 67002028257. Its totient is φ = 67001510562.

The previous prime is 67001769379. The next prime is 67001769413. The reversal of 67001769409 is 90496710076.

The square root of 67001769409 is 258847.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-67001769409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67001760409) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 129424 + ... + 388270.

It is an arithmetic number, because the mean of its divisors is an integer number (22334009419).

Almost surely, 2^67001769409 is an apocalyptic number.

67001769409 is the 258847-th square number.

67001769409 is the 129424-th centered octagonal number.

It is an amenable number.

67001769409 is a deficient number, since it is larger than the sum of its proper divisors (258848).

67001769409 is an frugal number, since it uses more digits than its factorization.

67001769409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517694 (or 258847 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 49.

Multiplying 67001769409 by its sum of digits (49), we get a square (3283086701041 = 1811929²).

The spelling of 67001769409 in words is "sixty-seven billion, one million, seven hundred sixty-nine thousand, four hundred nine".