72651641 has 8 divisors (see below), whose sum is σ = 78425280. Its totient is φ = 67095952.

The previous prime is 72651637. The next prime is 72651701. The reversal of 72651641 is 14615627.

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 72651641 - 2² = 72651637 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72651598 and 72651607.

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, 53795 + ... + 55128.

It is an arithmetic number, because the mean of its divisors is an integer number (9803160).

Almost surely, 2^72651641 is an apocalyptic number.

It is an amenable number.

72651641 is a deficient number, since it is larger than the sum of its proper divisors (5773639).

72651641 is a wasteful number, since it uses less digits than its factorization.

72651641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108975.

The product of its digits is 10080, while the sum is 32.

The square root of 72651641 is about 8523.5931977072. The cubic root of 72651641 is about 417.2680600625.

The spelling of 72651641 in words is "seventy-two million, six hundred fifty-one thousand, six hundred forty-one".