163490784737 has 4 divisors (see below), whose sum is σ = 186846611136. Its totient is φ = 140134958340.

The previous prime is 163490784707. The next prime is 163490784763. The reversal of 163490784737 is 737487094361.

It is a happy number.

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 163490784737 - 2¹⁰ = 163490783713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163490784707) 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, 11677913189 + ... + 11677913202.

It is an arithmetic number, because the mean of its divisors is an integer number (46711652784).

Almost surely, 2^163490784737 is an apocalyptic number.

It is an amenable number.

163490784737 is a deficient number, since it is larger than the sum of its proper divisors (23355826399).

163490784737 is an equidigital number, since it uses as much as digits as its factorization.

163490784737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23355826398.

The product of its (nonzero) digits is 21337344, while the sum is 59.

The spelling of 163490784737 in words is "one hundred sixty-three billion, four hundred ninety million, seven hundred eighty-four thousand, seven hundred thirty-seven".