195411977438 has 4 divisors (see below), whose sum is σ = 293117966160. Its totient is φ = 97705988718.

The previous prime is 195411977401. The next prime is 195411977447. The reversal of 195411977438 is 834779114591.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48852994358 + ... + 48852994361.

It is an arithmetic number, because the mean of its divisors is an integer number (73279491540).

Almost surely, 2^195411977438 is an apocalyptic number.

195411977438 is a deficient number, since it is larger than the sum of its proper divisors (97705988722).

195411977438 is an equidigital number, since it uses as much as digits as its factorization.

195411977438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97705988721.

The product of its digits is 7620480, while the sum is 59.

The spelling of 195411977438 in words is "one hundred ninety-five billion, four hundred eleven million, nine hundred seventy-seven thousand, four hundred thirty-eight".