396188111977 has 6 divisors (see below), whose sum is σ = 460871885418. Its totient is φ = 339589810224.

The previous prime is 396188111971. The next prime is 396188112011. The reversal of 396188111977 is 779111881693.

It can be written as a sum of positive squares in only one way, i.e., 296375715216 + 99812396761 = 544404^2 + 315931^2 .

It is not a de Polignac number, because 396188111977 - 2⁷ = 396188111849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (396188111971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4042735788 + ... + 4042735885.

It is an arithmetic number, because the mean of its divisors is an integer number (76811980903).

Almost surely, 2^396188111977 is an apocalyptic number.

It is an amenable number.

396188111977 is a deficient number, since it is larger than the sum of its proper divisors (64683773441).

396188111977 is an equidigital number, since it uses as much as digits as its factorization.

396188111977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8085471687 (or 8085471680 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 61.

The spelling of 396188111977 in words is "three hundred ninety-six billion, one hundred eighty-eight million, one hundred eleven thousand, nine hundred seventy-seven".