171356120399 has 4 divisors (see below), whose sum is σ = 171357615960. Its totient is φ = 171354624840.

The previous prime is 171356120371. The next prime is 171356120417. The reversal of 171356120399 is 993021653171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993021653171 = 53 ⋅18736257607.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171356120399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171356120339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560237 + ... + 810294.

It is an arithmetic number, because the mean of its divisors is an integer number (42839403990).

Almost surely, 2^171356120399 is an apocalyptic number.

171356120399 is a deficient number, since it is larger than the sum of its proper divisors (1495561).

171356120399 is a wasteful number, since it uses less digits than its factorization.

171356120399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495560.

The product of its (nonzero) digits is 306180, while the sum is 47.

The spelling of 171356120399 in words is "one hundred seventy-one billion, three hundred fifty-six million, one hundred twenty thousand, three hundred ninety-nine".