73172213806 has 16 divisors (see below), whose sum is σ = 109981949616. Its totient is φ = 36511606656.

The previous prime is 73172213761. The next prime is 73172213857. The reversal of 73172213806 is 60831227137.

It is a happy number.

It is a congruent number.

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, 4261270 + ... + 4278406.

It is an arithmetic number, because the mean of its divisors is an integer number (6873871851).

Almost surely, 2^73172213806 is an apocalyptic number.

73172213806 is a deficient number, since it is larger than the sum of its proper divisors (36809735810).

73172213806 is a wasteful number, since it uses less digits than its factorization.

73172213806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21363.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 73172213806 in words is "seventy-three billion, one hundred seventy-two million, two hundred thirteen thousand, eight hundred six".