43551506464661 has 8 divisors (see below), whose sum is σ = 46908848076384. Its totient is φ = 40195197100080.

The previous prime is 43551506464651. The next prime is 43551506464789. The reversal of 43551506464661 is 16646460515534.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43551506464661 - 2⁶ = 43551506464597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43551506464597 and 43551506464606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43551506464651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257974151 + ... + 258142916.

It is an arithmetic number, because the mean of its divisors is an integer number (5863606009548).

Almost surely, 2^{43551506464661} is an apocalyptic number.

It is an amenable number.

43551506464661 is a deficient number, since it is larger than the sum of its proper divisors (3357341611723).

43551506464661 is a wasteful number, since it uses less digits than its factorization.

43551506464661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516123571.

The product of its (nonzero) digits is 31104000, while the sum is 56.

The spelling of 43551506464661 in words is "forty-three trillion, five hundred fifty-one billion, five hundred six million, four hundred sixty-four thousand, six hundred sixty-one".