73542472609 has 2 divisors, whose sum is σ = 73542472610. Its totient is φ = 73542472608.

The previous prime is 73542472589. The next prime is 73542472669. The reversal of 73542472609 is 90627424537.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60201529600 + 13340943009 = 245360^2 + 115503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73542472609 is a prime.

It is not a weakly prime, because it can be changed into another prime (73542472669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36771236304 + 36771236305.

It is an arithmetic number, because the mean of its divisors is an integer number (36771236305).

Almost surely, 2^73542472609 is an apocalyptic number.

It is an amenable number.

73542472609 is a deficient number, since it is larger than the sum of its proper divisors (1).

73542472609 is an equidigital number, since it uses as much as digits as its factorization.

73542472609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 49.

The spelling of 73542472609 in words is "seventy-three billion, five hundred forty-two million, four hundred seventy-two thousand, six hundred nine".