72651871 has 8 divisors (see below), whose sum is σ = 76279680. Its totient is φ = 69063192.

The previous prime is 72651851. The next prime is 72651883. The reversal of 72651871 is 17815627.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72651871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72651871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72651841) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 5941 + ... + 13438.

It is an arithmetic number, because the mean of its divisors is an integer number (9534960).

Almost surely, 2^72651871 is an apocalyptic number.

72651871 is a deficient number, since it is larger than the sum of its proper divisors (3627809).

72651871 is a wasteful number, since it uses less digits than its factorization.

72651871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19565.

The product of its digits is 23520, while the sum is 37.

The square root of 72651871 is about 8523.6066896590. The cubic root of 72651871 is about 417.2685003901.

The spelling of 72651871 in words is "seventy-two million, six hundred fifty-one thousand, eight hundred seventy-one".