97155610261 has 2 divisors, whose sum is σ = 97155610262. Its totient is φ = 97155610260.

The previous prime is 97155610217. The next prime is 97155610273. The reversal of 97155610261 is 16201655179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76269868900 + 20885741361 = 276170^2 + 144519^2 .

It is an emirp because it is prime and its reverse (16201655179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97155610261 - 2¹⁷ = 97155479189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97155610661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48577805130 + 48577805131.

It is an arithmetic number, because the mean of its divisors is an integer number (48577805131).

Almost surely, 2^97155610261 is an apocalyptic number.

It is an amenable number.

97155610261 is a deficient number, since it is larger than the sum of its proper divisors (1).

97155610261 is an equidigital number, since it uses as much as digits as its factorization.

97155610261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 43.

The spelling of 97155610261 in words is "ninety-seven billion, one hundred fifty-five million, six hundred ten thousand, two hundred sixty-one".