418745851661 has 4 divisors (see below), whose sum is σ = 418785251424. Its totient is φ = 418706451900.

The previous prime is 418745851651. The next prime is 418745851739. The reversal of 418745851661 is 166158547814.

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 a de Polignac number, because none of the positive numbers 2^k-418745851661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 418745851597 and 418745851606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (418745851621) 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, 19683935 + ... + 19705196.

It is an arithmetic number, because the mean of its divisors is an integer number (104696312856).

Almost surely, 2^418745851661 is an apocalyptic number.

It is an amenable number.

418745851661 is a deficient number, since it is larger than the sum of its proper divisors (39399763).

418745851661 is a wasteful number, since it uses less digits than its factorization.

418745851661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39399762.

The product of its digits is 6451200, while the sum is 56.

The spelling of 418745851661 in words is "four hundred eighteen billion, seven hundred forty-five million, eight hundred fifty-one thousand, six hundred sixty-one".