608409873821 has 4 divisors (see below), whose sum is σ = 608412460572. Its totient is φ = 608407287072.

The previous prime is 608409873787. The next prime is 608409873847. The reversal of 608409873821 is 128378904806.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 323691585721 + 284718288100 = 568939^2 + 533590^2 .

It is a cyclic number.

It is not a de Polignac number, because 608409873821 - 2¹⁴ = 608409857437 is a prime.

It is a super-2 number, since 2×608409873821² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (608409873881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 900866 + ... + 1424211.

It is an arithmetic number, because the mean of its divisors is an integer number (152103115143).

Almost surely, 2^608409873821 is an apocalyptic number.

It is an amenable number.

608409873821 is a deficient number, since it is larger than the sum of its proper divisors (2586751).

608409873821 is a wasteful number, since it uses less digits than its factorization.

608409873821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586750.

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 608409873821 in words is "six hundred eight billion, four hundred nine million, eight hundred seventy-three thousand, eight hundred twenty-one".