195403804857 has 24 divisors (see below), whose sum is σ = 285029494464. Its totient is φ = 128986681824.

The previous prime is 195403804853. The next prime is 195403804859. The reversal of 195403804857 is 758408304591.

195403804857 is a `hidden beast` number, since 1 + 9 + 540 + 3 + 8 + 0 + 48 + 57 = 666.

It is not a de Polignac number, because 195403804857 - 2² = 195403804853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195403804853) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13270063 + ... + 13284779.

It is an arithmetic number, because the mean of its divisors is an integer number (11876228936).

Almost surely, 2^195403804857 is an apocalyptic number.

It is an amenable number.

195403804857 is a deficient number, since it is larger than the sum of its proper divisors (89625689607).

195403804857 is a wasteful number, since it uses less digits than its factorization.

195403804857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29149 (or 29146 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 195403804857 in words is "one hundred ninety-five billion, four hundred three million, eight hundred four thousand, eight hundred fifty-seven".