656213214605 has 8 divisors (see below), whose sum is σ = 848029385112. Its totient is φ = 484588219968.

The previous prime is 656213214577. The next prime is 656213214673. The reversal of 656213214605 is 506412312656.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17385477316 + 638827737289 = 131854^2 + 799267^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 656213214605 - 2¹⁰ = 656213213581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5047793894 + ... + 5047794023.

It is an arithmetic number, because the mean of its divisors is an integer number (106003673139).

Almost surely, 2^656213214605 is an apocalyptic number.

656213214605 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

656213214605 is a deficient number, since it is larger than the sum of its proper divisors (191816170507).

656213214605 is a wasteful number, since it uses less digits than its factorization.

656213214605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10095587935.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 656213214605 in words is "six hundred fifty-six billion, two hundred thirteen million, two hundred fourteen thousand, six hundred five".