260656537 has 2 divisors, whose sum is σ = 260656538. Its totient is φ = 260656536.

The previous prime is 260656519. The next prime is 260656541. The reversal of 260656537 is 735656062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208398096 + 52258441 = 14436^2 + 7229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260656537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 260656537.

It is not a weakly prime, because it can be changed into another prime (260656037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130328268 + 130328269.

It is an arithmetic number, because the mean of its divisors is an integer number (130328269).

Almost surely, 2^260656537 is an apocalyptic number.

It is an amenable number.

260656537 is a deficient number, since it is larger than the sum of its proper divisors (1).

260656537 is an equidigital number, since it uses as much as digits as its factorization.

260656537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 40.

The square root of 260656537 is about 16144.8610090022. The cubic root of 260656537 is about 638.7872027177.

The spelling of 260656537 in words is "two hundred sixty million, six hundred fifty-six thousand, five hundred thirty-seven".