73244501521 has 2 divisors, whose sum is σ = 73244501522. Its totient is φ = 73244501520.

The previous prime is 73244501483. The next prime is 73244501527. The reversal of 73244501521 is 12510544237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45640340496 + 27604161025 = 213636^2 + 166145^2 .

It is a cyclic number.

It is not a de Polignac number, because 73244501521 - 2²³ = 73236112913 is a prime.

It is not a weakly prime, because it can be changed into another prime (73244501527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36622250760 + 36622250761.

It is an arithmetic number, because the mean of its divisors is an integer number (36622250761).

Almost surely, 2^73244501521 is an apocalyptic number.

It is an amenable number.

73244501521 is a deficient number, since it is larger than the sum of its proper divisors (1).

73244501521 is an equidigital number, since it uses as much as digits as its factorization.

73244501521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 73244501521 in words is "seventy-three billion, two hundred forty-four million, five hundred one thousand, five hundred twenty-one".