72945441045 has 48 divisors (see below), whose sum is σ = 132012346752. Its totient is φ = 37191242880.

The previous prime is 72945441043. The next prime is 72945441061. The reversal of 72945441045 is 54014454927.

72945441045 is a `hidden beast` number, since 7 + 2 + 94 + 544 + 10 + 4 + 5 = 666.

It is not a de Polignac number, because 72945441045 - 2¹ = 72945441043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72945441043) 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 47 ways as a sum of consecutive naturals, for example, 1854927 + ... + 1893843.

It is an arithmetic number, because the mean of its divisors is an integer number (2750257224).

Almost surely, 2^72945441045 is an apocalyptic number.

It is an amenable number.

72945441045 is a deficient number, since it is larger than the sum of its proper divisors (59066905707).

72945441045 is a wasteful number, since it uses less digits than its factorization.

72945441045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40762 (or 40759 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 72945441045 in words is "seventy-two billion, nine hundred forty-five million, four hundred forty-one thousand, forty-five".