67565164489 has 3 divisors (see below), whose sum is σ = 67565424423. Its totient is φ = 67564904556.

The previous prime is 67565164391. The next prime is 67565164493. The reversal of 67565164489 is 98446156576.

The square root of 67565164489 is 259933.

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 can be written as a sum of positive squares in only one way, i.e., 12996025 + 67552168464 = 3605^2 + 259908^2 .

It is not a de Polignac number, because 67565164489 - 2¹⁹ = 67564640201 is a prime.

It is a super-2 number, since 2×67565164489² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67565144489) 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, 129967 + ... + 389899.

It is an arithmetic number, because the mean of its divisors is an integer number (22521808141).

Almost surely, 2^67565164489 is an apocalyptic number.

67565164489 is the 259933-rd square number.

67565164489 is the 129967-th centered octagonal number.

It is an amenable number.

67565164489 is a deficient number, since it is larger than the sum of its proper divisors (259934).

67565164489 is an frugal number, since it uses more digits than its factorization.

67565164489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519866 (or 259933 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 61.

The spelling of 67565164489 in words is "sixty-seven billion, five hundred sixty-five million, one hundred sixty-four thousand, four hundred eighty-nine".