73434647445661 has 4 divisors (see below), whose sum is σ = 76627458204192. Its totient is φ = 70241836687132.

The previous prime is 73434647445647. The next prime is 73434647445791. The reversal of 73434647445661 is 16654474643437.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73434647445661 - 2⁹ = 73434647445149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73434647445593 and 73434647445602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73434647446661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1596405379231 + ... + 1596405379276.

It is an arithmetic number, because the mean of its divisors is an integer number (19156864551048).

Almost surely, 2^{73434647445661} is an apocalyptic number.

It is an amenable number.

73434647445661 is a deficient number, since it is larger than the sum of its proper divisors (3192810758531).

73434647445661 is a wasteful number, since it uses less digits than its factorization.

73434647445661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192810758530.

The product of its digits is 487710720, while the sum is 64.

The spelling of 73434647445661 in words is "seventy-three trillion, four hundred thirty-four billion, six hundred forty-seven million, four hundred forty-five thousand, six hundred sixty-one".