171207421485 has 32 divisors (see below), whose sum is σ = 276702003072. Its totient is φ = 90387628800.

The previous prime is 171207421421. The next prime is 171207421487. The reversal of 171207421485 is 584124702171.

It is a happy number.

It is not a de Polignac number, because 171207421485 - 2⁶ = 171207421421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171207421487) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10046542 + ... + 10063568.

It is an arithmetic number, because the mean of its divisors is an integer number (8646937596).

Almost surely, 2^171207421485 is an apocalyptic number.

171207421485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

171207421485 is a deficient number, since it is larger than the sum of its proper divisors (105494581587).

171207421485 is a wasteful number, since it uses less digits than its factorization.

171207421485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23773.

The product of its (nonzero) digits is 125440, while the sum is 42.

The spelling of 171207421485 in words is "one hundred seventy-one billion, two hundred seven million, four hundred twenty-one thousand, four hundred eighty-five".