42173556249 has 16 divisors (see below), whose sum is σ = 61791122880. Its totient is φ = 25373160960.

The previous prime is 42173556241. The next prime is 42173556251. The reversal of 42173556249 is 94265537124.

It is not a de Polignac number, because 42173556249 - 2³ = 42173556241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42173556198 and 42173556207.

It is not an unprimeable number, because it can be changed into a prime (42173556241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4659664 + ... + 4668705.

It is an arithmetic number, because the mean of its divisors is an integer number (3861945180).

Almost surely, 2^42173556249 is an apocalyptic number.

It is an amenable number.

42173556249 is a deficient number, since it is larger than the sum of its proper divisors (19617566631).

42173556249 is a wasteful number, since it uses less digits than its factorization.

42173556249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9328520.

The product of its digits is 1814400, while the sum is 48.

The spelling of 42173556249 in words is "forty-two billion, one hundred seventy-three million, five hundred fifty-six thousand, two hundred forty-nine".