72184678045 has 8 divisors (see below), whose sum is σ = 86624623800. Its totient is φ = 57745735680.

The previous prime is 72184678043. The next prime is 72184678063. The reversal of 72184678045 is 54087648127.

It can be written as a sum of positive squares in 4 ways, for example, as 4221230841 + 67963447204 = 64971^2 + 260698^2 .

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

It is not a de Polignac number, because 72184678045 - 2¹ = 72184678043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72184677983 and 72184678001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72184678043) 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, 82276 + ... + 388765.

It is an arithmetic number, because the mean of its divisors is an integer number (10828077975).

Almost surely, 2^72184678045 is an apocalyptic number.

It is an amenable number.

72184678045 is a deficient number, since it is larger than the sum of its proper divisors (14439945755).

72184678045 is a wasteful number, since it uses less digits than its factorization.

72184678045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501695.

The product of its (nonzero) digits is 3010560, while the sum is 52.

The spelling of 72184678045 in words is "seventy-two billion, one hundred eighty-four million, six hundred seventy-eight thousand, forty-five".