163640453242654 has 32 divisors (see below), whose sum is σ = 262839538241280. Its totient is φ = 76220255812800.

The previous prime is 163640453242601. The next prime is 163640453242807. The reversal of 163640453242654 is 456242354046361.

It is a super-2 number, since 2×163640453242654² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 163640453242595 and 163640453242604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74900224 + ... + 77054035.

It is an arithmetic number, because the mean of its divisors is an integer number (8213735570040).

Almost surely, 2^{163640453242654} is an apocalyptic number.

163640453242654 is a deficient number, since it is larger than the sum of its proper divisors (99199084998626).

163640453242654 is a wasteful number, since it uses less digits than its factorization.

163640453242654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151954896.

The product of its (nonzero) digits is 49766400, while the sum is 55.

The spelling of 163640453242654 in words is "one hundred sixty-three trillion, six hundred forty billion, four hundred fifty-three million, two hundred forty-two thousand, six hundred fifty-four".