197158806418450 has 24 divisors (see below), whose sum is σ = 367049669356692. Its totient is φ = 78791632369920.

The previous prime is 197158806418423. The next prime is 197158806418463. The reversal of 197158806418450 is 54814608851791.

197158806418450 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 25281960565689 + 171876845852761 = 5028117^2 + 13110181^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1797199539 + ... + 1797309238.

Almost surely, 2^{197158806418450} is an apocalyptic number.

197158806418450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197158806418450 is a deficient number, since it is larger than the sum of its proper divisors (169890862938242).

197158806418450 is a wasteful number, since it uses less digits than its factorization.

197158806418450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594509886 (or 3594509881 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 67.

The spelling of 197158806418450 in words is "one hundred ninety-seven trillion, one hundred fifty-eight billion, eight hundred six million, four hundred eighteen thousand, four hundred fifty".