197664402053 has 4 divisors (see below), whose sum is σ = 197671420620. Its totient is φ = 197657383488.

The previous prime is 197664402049. The next prime is 197664402071. The reversal of 197664402053 is 350204466791.

197664402053 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 144265511329 + 53398890724 = 379823^2 + 231082^2 .

It is a cyclic number.

It is not a de Polignac number, because 197664402053 - 2² = 197664402049 is a prime.

It is a super-2 number, since 2×197664402053² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 197664401989 and 197664402007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197664405053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3466868 + ... + 3523421.

It is an arithmetic number, because the mean of its divisors is an integer number (49417855155).

Almost surely, 2^197664402053 is an apocalyptic number.

It is an amenable number.

197664402053 is a deficient number, since it is larger than the sum of its proper divisors (7018567).

197664402053 is an equidigital number, since it uses as much as digits as its factorization.

197664402053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7018566.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 197664402053 in words is "one hundred ninety-seven billion, six hundred sixty-four million, four hundred two thousand, fifty-three".