172680842247 has 16 divisors (see below), whose sum is σ = 234601803360. Its totient is φ = 112940527232.

The previous prime is 172680842237. The next prime is 172680842309. The reversal of 172680842247 is 742248086271.

It is not a de Polignac number, because 172680842247 - 2¹⁹ = 172680317959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172680842247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172680842207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2971393 + ... + 3028949.

It is an arithmetic number, because the mean of its divisors is an integer number (14662612710).

Almost surely, 2^172680842247 is an apocalyptic number.

172680842247 is a deficient number, since it is larger than the sum of its proper divisors (61920961113).

172680842247 is a wasteful number, since it uses less digits than its factorization.

172680842247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76482.

The product of its (nonzero) digits is 2408448, while the sum is 51.

The spelling of 172680842247 in words is "one hundred seventy-two billion, six hundred eighty million, eight hundred forty-two thousand, two hundred forty-seven".