656253011321 has 8 divisors (see below), whose sum is σ = 703227891744. Its totient is φ = 610208326720.

The previous prime is 656253011273. The next prime is 656253011347. The reversal of 656253011321 is 123110352656.

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 656253011321 - 2¹⁰ = 656253010297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656253011521) 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, 232547495 + ... + 232550316.

It is an arithmetic number, because the mean of its divisors is an integer number (87903486468).

Almost surely, 2^656253011321 is an apocalyptic number.

It is an amenable number.

656253011321 is a deficient number, since it is larger than the sum of its proper divisors (46974880423).

656253011321 is a wasteful number, since it uses less digits than its factorization.

656253011321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465097911.

The product of its (nonzero) digits is 32400, while the sum is 35.

Adding to 656253011321 its reverse (123110352656), we get a palindrome (779363363977).

The spelling of 656253011321 in words is "six hundred fifty-six billion, two hundred fifty-three million, eleven thousand, three hundred twenty-one".