167248775821 has 2 divisors, whose sum is σ = 167248775822. Its totient is φ = 167248775820.

The previous prime is 167248775803. The next prime is 167248775849. The reversal of 167248775821 is 128577842761.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166944970921 + 303804900 = 408589^2 + 17430^2 .

It is a cyclic number.

It is not a de Polignac number, because 167248775821 - 2⁵ = 167248775789 is a prime.

It is a super-2 number, since 2×167248775821² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167248745821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83624387910 + 83624387911.

It is an arithmetic number, because the mean of its divisors is an integer number (83624387911).

Almost surely, 2^167248775821 is an apocalyptic number.

It is an amenable number.

167248775821 is a deficient number, since it is larger than the sum of its proper divisors (1).

167248775821 is an equidigital number, since it uses as much as digits as its factorization.

167248775821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10536960, while the sum is 58.

The spelling of 167248775821 in words is "one hundred sixty-seven billion, two hundred forty-eight million, seven hundred seventy-five thousand, eight hundred twenty-one".