195019349091 has 32 divisors (see below), whose sum is σ = 303705415680. Its totient is φ = 108993011616.

The previous prime is 195019349087. The next prime is 195019349099. The reversal of 195019349091 is 190943910591.

It is not a de Polignac number, because 195019349091 - 2² = 195019349087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195019349099) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1372320 + ... + 1507746.

It is an arithmetic number, because the mean of its divisors is an integer number (9490794240).

Almost surely, 2^195019349091 is an apocalyptic number.

195019349091 is a deficient number, since it is larger than the sum of its proper divisors (108686066589).

195019349091 is a wasteful number, since it uses less digits than its factorization.

195019349091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136943.

The product of its (nonzero) digits is 393660, while the sum is 51.

The spelling of 195019349091 in words is "one hundred ninety-five billion, nineteen million, three hundred forty-nine thousand, ninety-one".