164256661357 has 2 divisors, whose sum is σ = 164256661358. Its totient is φ = 164256661356.

The previous prime is 164256661343. The next prime is 164256661369. The reversal of 164256661357 is 753166652461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138703360041 + 25553301316 = 372429^2 + 159854^2 .

It is a cyclic number.

It is not a de Polignac number, because 164256661357 - 2²⁷ = 164122443629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164256661157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82128330678 + 82128330679.

It is an arithmetic number, because the mean of its divisors is an integer number (82128330679).

Almost surely, 2^164256661357 is an apocalyptic number.

It is an amenable number.

164256661357 is a deficient number, since it is larger than the sum of its proper divisors (1).

164256661357 is an equidigital number, since it uses as much as digits as its factorization.

164256661357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5443200, while the sum is 52.

The spelling of 164256661357 in words is "one hundred sixty-four billion, two hundred fifty-six million, six hundred sixty-one thousand, three hundred fifty-seven".