656717692241 has 8 divisors (see below), whose sum is σ = 707247655464. Its totient is φ = 606189617280.

The previous prime is 656717692171. The next prime is 656717692291. The reversal of 656717692241 is 142296717656.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3465794641 + 653251897600 = 58871^2 + 808240^2 .

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

It is not a de Polignac number, because 656717692241 - 2¹⁸ = 656717430097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656717692291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296645 + ... + 1183821.

It is an arithmetic number, because the mean of its divisors is an integer number (88405956933).

Almost surely, 2^656717692241 is an apocalyptic number.

It is an amenable number.

656717692241 is a deficient number, since it is larger than the sum of its proper divisors (50529963223).

656717692241 is a wasteful number, since it uses less digits than its factorization.

656717692241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944131.

The product of its digits is 7620480, while the sum is 56.

The spelling of 656717692241 in words is "six hundred fifty-six billion, seven hundred seventeen million, six hundred ninety-two thousand, two hundred forty-one".