167621412281 has 2 divisors, whose sum is σ = 167621412282. Its totient is φ = 167621412280.

The previous prime is 167621412239. The next prime is 167621412307. The reversal of 167621412281 is 182214126761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161034466681 + 6586945600 = 401291^2 + 81160^2 .

It is an emirp because it is prime and its reverse (182214126761) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-167621412281 is a prime.

It is a super-2 number, since 2×167621412281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (167621417281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83810706140 + 83810706141.

It is an arithmetic number, because the mean of its divisors is an integer number (83810706141).

Almost surely, 2^167621412281 is an apocalyptic number.

It is an amenable number.

167621412281 is a deficient number, since it is larger than the sum of its proper divisors (1).

167621412281 is an equidigital number, since it uses as much as digits as its factorization.

167621412281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 41.

The spelling of 167621412281 in words is "one hundred sixty-seven billion, six hundred twenty-one million, four hundred twelve thousand, two hundred eighty-one".