167791927649 has 2 divisors, whose sum is σ = 167791927650. Its totient is φ = 167791927648.

The previous prime is 167791927621. The next prime is 167791927663. The reversal of 167791927649 is 946729197761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145929348049 + 21862579600 = 382007^2 + 147860^2 .

It is an emirp because it is prime and its reverse (946729197761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 167791927649 - 2¹² = 167791923553 is a prime.

It is not a weakly prime, because it can be changed into another prime (167791927619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83895963824 + 83895963825.

It is an arithmetic number, because the mean of its divisors is an integer number (83895963825).

Almost surely, 2^167791927649 is an apocalyptic number.

It is an amenable number.

167791927649 is a deficient number, since it is larger than the sum of its proper divisors (1).

167791927649 is an equidigital number, since it uses as much as digits as its factorization.

167791927649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72013536, while the sum is 68.

The spelling of 167791927649 in words is "one hundred sixty-seven billion, seven hundred ninety-one million, nine hundred twenty-seven thousand, six hundred forty-nine".