163451747644 has 6 divisors (see below), whose sum is σ = 286040558384. Its totient is φ = 81725873820.

The previous prime is 163451747639. The next prime is 163451747647. The reversal of 163451747644 is 446747154361.

It is a junction number, because it is equal to n+sod(n) for n = 163451747591 and 163451747600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163451747647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20431468452 + ... + 20431468459.

Almost surely, 2^163451747644 is an apocalyptic number.

It is an amenable number.

163451747644 is a deficient number, since it is larger than the sum of its proper divisors (122588810740).

163451747644 is a wasteful number, since it uses less digits than its factorization.

163451747644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40862936915 (or 40862936913 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 52.

The spelling of 163451747644 in words is "one hundred sixty-three billion, four hundred fifty-one million, seven hundred forty-seven thousand, six hundred forty-four".