656020340331 has 8 divisors (see below), whose sum is σ = 875004083520. Its totient is φ = 437191745352.

The previous prime is 656020340249. The next prime is 656020340347. The reversal of 656020340331 is 133043020656.

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

It is not a de Polignac number, because 656020340331 - 2³⁵ = 621660601963 is a prime.

It is a super-2 number, since 2×656020340331² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 656020340292 and 656020340301.

It is not an unprimeable number, because it can be changed into a prime (656020320331) 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, 38777185 + ... + 38794098.

It is an arithmetic number, because the mean of its divisors is an integer number (109375510440).

Almost surely, 2^656020340331 is an apocalyptic number.

656020340331 is a deficient number, since it is larger than the sum of its proper divisors (218983743189).

656020340331 is a wasteful number, since it uses less digits than its factorization.

656020340331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77574105.

The product of its (nonzero) digits is 38880, while the sum is 33.

Adding to 656020340331 its reverse (133043020656), we get a palindrome (789063360987).

The spelling of 656020340331 in words is "six hundred fifty-six billion, twenty million, three hundred forty thousand, three hundred thirty-one".