171979557207 has 8 divisors (see below), whose sum is σ = 229308236784. Its totient is φ = 114651957888.

The previous prime is 171979557151. The next prime is 171979557229. The reversal of 171979557207 is 702755979171.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 171979557207 - 2¹² = 171979553111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171979557247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237903 + ... + 632895.

It is an arithmetic number, because the mean of its divisors is an integer number (28663529598).

Almost surely, 2^171979557207 is an apocalyptic number.

171979557207 is a deficient number, since it is larger than the sum of its proper divisors (57328679577).

171979557207 is a wasteful number, since it uses less digits than its factorization.

171979557207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540129.

The product of its (nonzero) digits is 9724050, while the sum is 60.

The spelling of 171979557207 in words is "one hundred seventy-one billion, nine hundred seventy-nine million, five hundred fifty-seven thousand, two hundred seven".