72071564 has 6 divisors (see below), whose sum is σ = 126125244. Its totient is φ = 36035780.

The previous prime is 72071557. The next prime is 72071599. The reversal of 72071564 is 46517027.

It is a self number, because there is not a number n which added to its sum of digits gives 72071564.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9008942 + ... + 9008949.

It is an arithmetic number, because the mean of its divisors is an integer number (21020874).

Almost surely, 2^72071564 is an apocalyptic number.

It is an amenable number.

72071564 is a deficient number, since it is larger than the sum of its proper divisors (54053680).

72071564 is a wasteful number, since it uses less digits than its factorization.

72071564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18017895 (or 18017893 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 72071564 is about 8489.4972760464. The cubic root of 72071564 is about 416.1545514870.

The spelling of 72071564 in words is "seventy-two million, seventy-one thousand, five hundred sixty-four".