201712156232426 has 16 divisors (see below), whose sum is σ = 350529148209984. Its totient is φ = 85263846861024.

The previous prime is 201712156232417. The next prime is 201712156232449. The reversal of 201712156232426 is 624232651217102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98685006920 + ... + 98685008963.

It is an arithmetic number, because the mean of its divisors is an integer number (21908071763124).

Almost surely, 2^{201712156232426} is an apocalyptic number.

201712156232426 is a deficient number, since it is larger than the sum of its proper divisors (148816991977558).

201712156232426 is a wasteful number, since it uses less digits than its factorization.

201712156232426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197370015965.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 201712156232426 in words is "two hundred one trillion, seven hundred twelve billion, one hundred fifty-six million, two hundred thirty-two thousand, four hundred twenty-six".