195794490643 has 12 divisors (see below), whose sum is σ = 217032323760. Its totient is φ = 176265110912.

The previous prime is 195794490631. The next prime is 195794490653. The reversal of 195794490643 is 346094497591.

It is not a de Polignac number, because 195794490643 - 2³⁷ = 58355537171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195794490623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14721388 + ... + 14734681.

It is an arithmetic number, because the mean of its divisors is an integer number (18086026980).

Almost surely, 2^195794490643 is an apocalyptic number.

195794490643 is a deficient number, since it is larger than the sum of its proper divisors (21237833117).

195794490643 is a wasteful number, since it uses less digits than its factorization.

195794490643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29456126 (or 29456109 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 61.

The spelling of 195794490643 in words is "one hundred ninety-five billion, seven hundred ninety-four million, four hundred ninety thousand, six hundred forty-three".