208379194491 has 16 divisors (see below), whose sum is σ = 299892750080. Its totient is φ = 127941236640.

The previous prime is 208379194459. The next prime is 208379194523. The reversal of 208379194491 is 194491973802.

It is an interprime number because it is at equal distance from previous prime (208379194459) and next prime (208379194523).

It is not a de Polignac number, because 208379194491 - 2⁵ = 208379194459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208379194421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6068365 + ... + 6102606.

It is an arithmetic number, because the mean of its divisors is an integer number (18743296880).

Almost surely, 2^208379194491 is an apocalyptic number.

208379194491 is a deficient number, since it is larger than the sum of its proper divisors (91513555589).

208379194491 is a wasteful number, since it uses less digits than its factorization.

208379194491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12171426.

The product of its (nonzero) digits is 3919104, while the sum is 57.

The spelling of 208379194491 in words is "two hundred eight billion, three hundred seventy-nine million, one hundred ninety-four thousand, four hundred ninety-one".