72945064 has 8 divisors (see below), whose sum is σ = 136772010. Its totient is φ = 36472528.

The previous prime is 72945049. The next prime is 72945091. The reversal of 72945064 is 46054927.

It can be written as a sum of positive squares in only one way, i.e., 71402500 + 1542564 = 8450^2 + 1242^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4559059 + ... + 4559074.

Almost surely, 2^72945064 is an apocalyptic number.

It is an amenable number.

72945064 is a deficient number, since it is larger than the sum of its proper divisors (63826946).

72945064 is a wasteful number, since it uses less digits than its factorization.

72945064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9118139 (or 9118135 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 72945064 is about 8540.7882540196. The cubic root of 72945064 is about 417.8290548910.

The spelling of 72945064 in words is "seventy-two million, nine hundred forty-five thousand, sixty-four".