163553798 has 4 divisors (see below), whose sum is σ = 245330700. Its totient is φ = 81776898.

The previous prime is 163553791. The next prime is 163553807. The reversal of 163553798 is 897355361.

163553798 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163553791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40888448 + ... + 40888451.

It is an arithmetic number, because the mean of its divisors is an integer number (61332675).

Almost surely, 2^163553798 is an apocalyptic number.

163553798 is a deficient number, since it is larger than the sum of its proper divisors (81776902).

163553798 is an equidigital number, since it uses as much as digits as its factorization.

163553798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81776901.

The product of its digits is 680400, while the sum is 47.

The square root of 163553798 is about 12788.8153477951. The cubic root of 163553798 is about 546.8734983926.

The spelling of 163553798 in words is "one hundred sixty-three million, five hundred fifty-three thousand, seven hundred ninety-eight".