73118505773 has 2 divisors, whose sum is σ = 73118505774. Its totient is φ = 73118505772.

The previous prime is 73118505751. The next prime is 73118505793. The reversal of 73118505773 is 37750581137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65914400644 + 7204105129 = 256738^2 + 84877^2 .

It is a cyclic number.

It is not a de Polignac number, because 73118505773 - 2⁶ = 73118505709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73118505793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36559252886 + 36559252887.

It is an arithmetic number, because the mean of its divisors is an integer number (36559252887).

Almost surely, 2^73118505773 is an apocalyptic number.

It is an amenable number.

73118505773 is a deficient number, since it is larger than the sum of its proper divisors (1).

73118505773 is an equidigital number, since it uses as much as digits as its factorization.

73118505773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 617400, while the sum is 47.

The spelling of 73118505773 in words is "seventy-three billion, one hundred eighteen million, five hundred five thousand, seven hundred seventy-three".