196818878390 has 64 divisors (see below), whose sum is σ = 364235616000. Its totient is φ = 76546823040.

The previous prime is 196818878339. The next prime is 196818878401. The reversal of 196818878390 is 93878818691.

It is a self number, because there is not a number n which added to its sum of digits gives 196818878390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32566709 + ... + 32572751.

It is an arithmetic number, because the mean of its divisors is an integer number (5691181500).

Almost surely, 2^196818878390 is an apocalyptic number.

196818878390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

196818878390 is a deficient number, since it is larger than the sum of its proper divisors (167416737610).

196818878390 is a wasteful number, since it uses less digits than its factorization.

196818878390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6717.

The product of its (nonzero) digits is 41803776, while the sum is 68.

The spelling of 196818878390 in words is "one hundred ninety-six billion, eight hundred eighteen million, eight hundred seventy-eight thousand, three hundred ninety".