656404134047 has 2 divisors, whose sum is σ = 656404134048. Its totient is φ = 656404134046.

The previous prime is 656404134013. The next prime is 656404134083. The reversal of 656404134047 is 740431404656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 656404134047 - 2¹² = 656404129951 is a prime.

It is a super-3 number, since 3×656404134047³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 656404133989 and 656404134007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656404134097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328202067023 + 328202067024.

It is an arithmetic number, because the mean of its divisors is an integer number (328202067024).

Almost surely, 2^656404134047 is an apocalyptic number.

656404134047 is a deficient number, since it is larger than the sum of its proper divisors (1).

656404134047 is an equidigital number, since it uses as much as digits as its factorization.

656404134047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 44.

The spelling of 656404134047 in words is "six hundred fifty-six billion, four hundred four million, one hundred thirty-four thousand, forty-seven".