3645237213073 has 2 divisors, whose sum is σ = 3645237213074. Its totient is φ = 3645237213072.

The previous prime is 3645237213053. The next prime is 3645237213131. The reversal of 3645237213073 is 3703127325463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3134801268369 + 510435944704 = 1770537^2 + 714448^2 .

It is a cyclic number.

It is not a de Polignac number, because 3645237213073 - 2⁵ = 3645237213041 is a prime.

It is not a weakly prime, because it can be changed into another prime (3645237213053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1822618606536 + 1822618606537.

It is an arithmetic number, because the mean of its divisors is an integer number (1822618606537).

Almost surely, 2^{3645237213073} is an apocalyptic number.

It is an amenable number.

3645237213073 is a deficient number, since it is larger than the sum of its proper divisors (1).

3645237213073 is an equidigital number, since it uses as much as digits as its factorization.

3645237213073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 46.

The spelling of 3645237213073 in words is "three trillion, six hundred forty-five billion, two hundred thirty-seven million, two hundred thirteen thousand, seventy-three".