72545651 has 2 divisors, whose sum is σ = 72545652. Its totient is φ = 72545650.

The previous prime is 72545623. The next prime is 72545699. The reversal of 72545651 is 15654527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72545651 - 2⁶ = 72545587 is a prime.

It is not a weakly prime, because it can be changed into another prime (72545951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36272825 + 36272826.

It is an arithmetic number, because the mean of its divisors is an integer number (36272826).

Almost surely, 2^72545651 is an apocalyptic number.

72545651 is a deficient number, since it is larger than the sum of its proper divisors (1).

72545651 is an equidigital number, since it uses as much as digits as its factorization.

72545651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42000, while the sum is 35.

The square root of 72545651 is about 8517.3734801287. The cubic root of 72545651 is about 417.0650466805.

The spelling of 72545651 in words is "seventy-two million, five hundred forty-five thousand, six hundred fifty-one".