947575195561 has 2 divisors, whose sum is σ = 947575195562. Its totient is φ = 947575195560.

The previous prime is 947575195513. The next prime is 947575195573. The reversal of 947575195561 is 165591575749.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 943316850025 + 4258345536 = 971245^2 + 65256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-947575195561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 947575195493 and 947575195502.

It is not a weakly prime, because it can be changed into another prime (947575135561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473787597780 + 473787597781.

It is an arithmetic number, because the mean of its divisors is an integer number (473787597781).

Almost surely, 2^947575195561 is an apocalyptic number.

It is an amenable number.

947575195561 is a deficient number, since it is larger than the sum of its proper divisors (1).

947575195561 is an equidigital number, since it uses as much as digits as its factorization.

947575195561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59535000, while the sum is 64.

The spelling of 947575195561 in words is "nine hundred forty-seven billion, five hundred seventy-five million, one hundred ninety-five thousand, five hundred sixty-one".