53871802609 has 3 divisors (see below), whose sum is σ = 53872034713. Its totient is φ = 53871570506.

The previous prime is 53871802603. The next prime is 53871802631. The reversal of 53871802609 is 90620817835.

The square root of 53871802609 is 232103.

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 not a de Polignac number, because 53871802609 - 2⁵ = 53871802577 is a prime.

It is a super-2 number, since 2×53871802609² (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 (53871802603) 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, 116052 + ... + 348154.

Almost surely, 2^53871802609 is an apocalyptic number.

53871802609 is the 232103-rd square number.

53871802609 is the 116052-nd centered octagonal number.

It is an amenable number.

53871802609 is a deficient number, since it is larger than the sum of its proper divisors (232104).

53871802609 is an frugal number, since it uses more digits than its factorization.

53871802609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464206 (or 232103 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

Multiplying 53871802609 by its sum of digits (49), we get a square (2639718327841 = 1624721²).

The spelling of 53871802609 in words is "fifty-three billion, eight hundred seventy-one million, eight hundred two thousand, six hundred nine".