72641577 has 8 divisors (see below), whose sum is σ = 99108064. Its totient is φ = 47301408.

The previous prime is 72641573. The next prime is 72641669. The reversal of 72641577 is 77514627.

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

It is not a de Polignac number, because 72641577 - 2² = 72641573 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72641573) by changing a digit.

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, 281428 + ... + 281685.

It is an arithmetic number, because the mean of its divisors is an integer number (12388508).

Almost surely, 2^72641577 is an apocalyptic number.

It is an amenable number.

72641577 is a deficient number, since it is larger than the sum of its proper divisors (26466487).

72641577 is a wasteful number, since it uses less digits than its factorization.

72641577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563159.

The product of its digits is 82320, while the sum is 39.

The square root of 72641577 is about 8523.0028159094. The cubic root of 72641577 is about 417.2487919514.

It can be divided in two parts, 726415 and 77, that multiplied together give a palindrome (55933955).

The spelling of 72641577 in words is "seventy-two million, six hundred forty-one thousand, five hundred seventy-seven".