65056101656561 has 2 divisors, whose sum is σ = 65056101656562. Its totient is φ = 65056101656560.

The previous prime is 65056101656489. The next prime is 65056101656573. The reversal of 65056101656561 is 16565610165056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39414476829025 + 25641624827536 = 6278095^2 + 5063756^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65056101656561 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (65056101656461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32528050828280 + 32528050828281.

It is an arithmetic number, because the mean of its divisors is an integer number (32528050828281).

Almost surely, 2^{65056101656561} is an apocalyptic number.

It is an amenable number.

65056101656561 is a deficient number, since it is larger than the sum of its proper divisors (1).

65056101656561 is an equidigital number, since it uses as much as digits as its factorization.

65056101656561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 65056101656561 in words is "sixty-five trillion, fifty-six billion, one hundred one million, six hundred fifty-six thousand, five hundred sixty-one".