73435403653 has 2 divisors, whose sum is σ = 73435403654. Its totient is φ = 73435403652.

The previous prime is 73435403641. The next prime is 73435403663. The reversal of 73435403653 is 35630453437.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43348072804 + 30087330849 = 208202^2 + 173457^2 .

It is a cyclic number.

It is not a de Polignac number, because 73435403653 - 2⁹ = 73435403141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73435403663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36717701826 + 36717701827.

It is an arithmetic number, because the mean of its divisors is an integer number (36717701827).

Almost surely, 2^73435403653 is an apocalyptic number.

It is an amenable number.

73435403653 is a deficient number, since it is larger than the sum of its proper divisors (1).

73435403653 is an equidigital number, since it uses as much as digits as its factorization.

73435403653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 43.

The spelling of 73435403653 in words is "seventy-three billion, four hundred thirty-five million, four hundred three thousand, six hundred fifty-three".