72064558 has 4 divisors (see below), whose sum is σ = 108096840. Its totient is φ = 36032278.

The previous prime is 72064477. The next prime is 72064571. The reversal of 72064558 is 85546027.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18016138 + ... + 18016141.

It is an arithmetic number, because the mean of its divisors is an integer number (27024210).

Almost surely, 2^72064558 is an apocalyptic number.

72064558 is a deficient number, since it is larger than the sum of its proper divisors (36032282).

72064558 is a wasteful number, since it uses less digits than its factorization.

72064558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36032281.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 72064558 is about 8489.0846385226. The cubic root of 72064558 is about 416.1410664030.

The spelling of 72064558 in words is "seventy-two million, sixty-four thousand, five hundred fifty-eight".