168963140578 has 4 divisors (see below), whose sum is σ = 253444710870. Its totient is φ = 84481570288.

The previous prime is 168963140561. The next prime is 168963140617. The reversal of 168963140578 is 875041369861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 875041369861 = 37 ⋅23649766753.

It can be written as a sum of positive squares in only one way, i.e., 167651759209 + 1311381369 = 409453^2 + 36213^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42240785143 + ... + 42240785146.

Almost surely, 2^168963140578 is an apocalyptic number.

168963140578 is a deficient number, since it is larger than the sum of its proper divisors (84481570292).

168963140578 is an equidigital number, since it uses as much as digits as its factorization.

168963140578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84481570291.

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 168963140578 in words is "one hundred sixty-eight billion, nine hundred sixty-three million, one hundred forty thousand, five hundred seventy-eight".