196211407638 has 16 divisors (see below), whose sum is σ = 393515919360. Its totient is φ = 65221618536.

The previous prime is 196211407607. The next prime is 196211407727. The reversal of 196211407638 is 836704112691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45543670 + ... + 45547977.

It is an arithmetic number, because the mean of its divisors is an integer number (24594744960).

Almost surely, 2^196211407638 is an apocalyptic number.

196211407638 is an abundant number, since it is smaller than the sum of its proper divisors (197304511722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

196211407638 is a wasteful number, since it uses less digits than its factorization.

196211407638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91092011.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 196211407638 in words is "one hundred ninety-six billion, two hundred eleven million, four hundred seven thousand, six hundred thirty-eight".