171540934157 has 4 divisors (see below), whose sum is σ = 171548785056. Its totient is φ = 171533083260.

The previous prime is 171540934133. The next prime is 171540934171. The reversal of 171540934157 is 751439045171.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 171540934157 - 2²⁴ = 171524156941 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 (171540934177) 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, 3892583 + ... + 3936404.

It is an arithmetic number, because the mean of its divisors is an integer number (42887196264).

Almost surely, 2^171540934157 is an apocalyptic number.

It is an amenable number.

171540934157 is a deficient number, since it is larger than the sum of its proper divisors (7850899).

171540934157 is an equidigital number, since it uses as much as digits as its factorization.

171540934157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7850898.

The product of its (nonzero) digits is 529200, while the sum is 47.

The spelling of 171540934157 in words is "one hundred seventy-one billion, five hundred forty million, nine hundred thirty-four thousand, one hundred fifty-seven".