195732130091 has 4 divisors (see below), whose sum is σ = 195823043592. Its totient is φ = 195641216592.

The previous prime is 195732130081. The next prime is 195732130133. The reversal of 195732130091 is 190031237591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190031237591 = 13 ⋅14617787507.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195732130091 is a prime.

It is a super-2 number, since 2×195732130091² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195732130051) 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, 45453521 + ... + 45457826.

It is an arithmetic number, because the mean of its divisors is an integer number (48955760898).

Almost surely, 2^195732130091 is an apocalyptic number.

195732130091 is a deficient number, since it is larger than the sum of its proper divisors (90913501).

195732130091 is an equidigital number, since it uses as much as digits as its factorization.

195732130091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90913500.

The product of its (nonzero) digits is 51030, while the sum is 41.

The spelling of 195732130091 in words is "one hundred ninety-five billion, seven hundred thirty-two million, one hundred thirty thousand, ninety-one".