73278188545 has 8 divisors (see below), whose sum is σ = 88425077760. Its totient is φ = 58295049840.

The previous prime is 73278188539. The next prime is 73278188549. The reversal of 73278188545 is 54588187237.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73278188545 - 2⁵ = 73278188513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73278188545.

It is not an unprimeable number, because it can be changed into a prime (73278188549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40936641 + ... + 40938430.

It is an arithmetic number, because the mean of its divisors is an integer number (11053134720).

Almost surely, 2^73278188545 is an apocalyptic number.

It is an amenable number.

73278188545 is a deficient number, since it is larger than the sum of its proper divisors (15146889215).

73278188545 is a wasteful number, since it uses less digits than its factorization.

73278188545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81875255.

The product of its digits is 15052800, while the sum is 58.

The spelling of 73278188545 in words is "seventy-three billion, two hundred seventy-eight million, one hundred eighty-eight thousand, five hundred forty-five".