171611400379 has 2 divisors, whose sum is σ = 171611400380. Its totient is φ = 171611400378.

The previous prime is 171611400371. The next prime is 171611400421. The reversal of 171611400379 is 973004116171.

It is a weak prime.

It is an emirp because it is prime and its reverse (973004116171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171611400379 - 2³ = 171611400371 is a prime.

It is not a weakly prime, because it can be changed into another prime (171611400371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85805700189 + 85805700190.

It is an arithmetic number, because the mean of its divisors is an integer number (85805700190).

Almost surely, 2^171611400379 is an apocalyptic number.

171611400379 is a deficient number, since it is larger than the sum of its proper divisors (1).

171611400379 is an equidigital number, since it uses as much as digits as its factorization.

171611400379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 40.

The spelling of 171611400379 in words is "one hundred seventy-one billion, six hundred eleven million, four hundred thousand, three hundred seventy-nine".