72473401045 has 4 divisors (see below), whose sum is σ = 86968081260. Its totient is φ = 57978720832.

The previous prime is 72473401037. The next prime is 72473401061. The reversal of 72473401045 is 54010437427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17286464484 + 55186936561 = 131478^2 + 234919^2 .

It is a cyclic number.

It is not a de Polignac number, because 72473401045 - 2³ = 72473401037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72473400995 and 72473401013.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7247340100 + ... + 7247340109.

It is an arithmetic number, because the mean of its divisors is an integer number (21742020315).

Almost surely, 2^72473401045 is an apocalyptic number.

It is an amenable number.

72473401045 is a deficient number, since it is larger than the sum of its proper divisors (14494680215).

72473401045 is a wasteful number, since it uses less digits than its factorization.

72473401045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14494680214.

The product of its (nonzero) digits is 94080, while the sum is 37.

The spelling of 72473401045 in words is "seventy-two billion, four hundred seventy-three million, four hundred one thousand, forty-five".