195777964 has 12 divisors (see below), whose sum is σ = 342768888. Its totient is φ = 97844000.

The previous prime is 195777961. The next prime is 195777973. The reversal of 195777964 is 469777591.

It is a super-2 number, since 2×195777964² = 76658022375970592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (195777961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262 + ... + 19789.

It is an arithmetic number, because the mean of its divisors is an integer number (28564074).

Almost surely, 2^195777964 is an apocalyptic number.

It is an amenable number.

195777964 is a deficient number, since it is larger than the sum of its proper divisors (146990924).

195777964 is a wasteful number, since it uses less digits than its factorization.

195777964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22496 (or 22494 counting only the distinct ones).

The product of its digits is 3333960, while the sum is 55.

The square root of 195777964 is about 13992.0678957758. The cubic root of 195777964 is about 580.6591436140.

The spelling of 195777964 in words is "one hundred ninety-five million, seven hundred seventy-seven thousand, nine hundred sixty-four".