172042439047 has 16 divisors (see below), whose sum is σ = 183424384000. Its totient is φ = 160893985824.

The previous prime is 172042439029. The next prime is 172042439077. The reversal of 172042439047 is 740934240271.

It is a cyclic number.

It is not a de Polignac number, because 172042439047 - 2²³ = 172034050439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172042438994 and 172042439012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172042439077) 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, 13666318 + ... + 13678900.

It is an arithmetic number, because the mean of its divisors is an integer number (11464024000).

Almost surely, 2^172042439047 is an apocalyptic number.

172042439047 is a deficient number, since it is larger than the sum of its proper divisors (11381944953).

172042439047 is a wasteful number, since it uses less digits than its factorization.

172042439047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21790.

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 172042439047 in words is "one hundred seventy-two billion, forty-two million, four hundred thirty-nine thousand, forty-seven".