75561292817 has 2 divisors, whose sum is σ = 75561292818. Its totient is φ = 75561292816.

The previous prime is 75561292783. The next prime is 75561292841. The reversal of 75561292817 is 71829216557.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74472226816 + 1089066001 = 272896^2 + 33001^2 .

It is a cyclic number.

It is not a de Polignac number, because 75561292817 - 2¹⁸ = 75561030673 is a prime.

It is not a weakly prime, because it can be changed into another prime (75561292217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37780646408 + 37780646409.

It is an arithmetic number, because the mean of its divisors is an integer number (37780646409).

Almost surely, 2^75561292817 is an apocalyptic number.

It is an amenable number.

75561292817 is a deficient number, since it is larger than the sum of its proper divisors (1).

75561292817 is an equidigital number, since it uses as much as digits as its factorization.

75561292817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2116800, while the sum is 53.

The spelling of 75561292817 in words is "seventy-five billion, five hundred sixty-one million, two hundred ninety-two thousand, eight hundred seventeen".