72653639501 has 2 divisors, whose sum is σ = 72653639502. Its totient is φ = 72653639500.

The previous prime is 72653639491. The next prime is 72653639567. The reversal of 72653639501 is 10593635627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43812769225 + 28840870276 = 209315^2 + 169826^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72653639501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72653639701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36326819750 + 36326819751.

It is an arithmetic number, because the mean of its divisors is an integer number (36326819751).

Almost surely, 2^72653639501 is an apocalyptic number.

It is an amenable number.

72653639501 is a deficient number, since it is larger than the sum of its proper divisors (1).

72653639501 is an equidigital number, since it uses as much as digits as its factorization.

72653639501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1020600, while the sum is 47.

The spelling of 72653639501 in words is "seventy-two billion, six hundred fifty-three million, six hundred thirty-nine thousand, five hundred one".