72641605 has 8 divisors (see below), whose sum is σ = 87235200. Its totient is φ = 58069776.

The previous prime is 72641573. The next prime is 72641669. The reversal of 72641605 is 50614627.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72641605 - 2⁵ = 72641573 is a prime.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 3136 + ... + 12454.

It is an arithmetic number, because the mean of its divisors is an integer number (10904400).

Almost surely, 2^72641605 is an apocalyptic number.

It is an amenable number.

72641605 is a deficient number, since it is larger than the sum of its proper divisors (14593595).

72641605 is a wasteful number, since it uses less digits than its factorization.

72641605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10883.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 72641605 is about 8523.0044585228. The cubic root of 72641605 is about 417.2488455615.

The spelling of 72641605 in words is "seventy-two million, six hundred forty-one thousand, six hundred five".