72061845 has 16 divisors (see below), whose sum is σ = 116690112. Its totient is φ = 37969280.

The previous prime is 72061841. The next prime is 72061879. The reversal of 72061845 is 54816027.

It is not a de Polignac number, because 72061845 - 2² = 72061841 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72061841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27696 + ... + 30185.

It is an arithmetic number, because the mean of its divisors is an integer number (7293132).

Almost surely, 2^72061845 is an apocalyptic number.

It is an amenable number.

72061845 is a deficient number, since it is larger than the sum of its proper divisors (44628267).

72061845 is a wasteful number, since it uses less digits than its factorization.

72061845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57972.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 72061845 is about 8488.9248435830. The cubic root of 72061845 is about 416.1358442110.

The spelling of 72061845 in words is "seventy-two million, sixty-one thousand, eight hundred forty-five".