195072755905 has 4 divisors (see below), whose sum is σ = 234087307092. Its totient is φ = 156058204720.

The previous prime is 195072755897. The next prime is 195072755921. The reversal of 195072755905 is 509557270591.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 113455122561 + 81617633344 = 336831^2 + 285688^2 .

It is not a de Polignac number, because 195072755905 - 2³ = 195072755897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19507275586 + ... + 19507275595.

It is an arithmetic number, because the mean of its divisors is an integer number (58521826773).

Almost surely, 2^195072755905 is an apocalyptic number.

It is an amenable number.

195072755905 is a deficient number, since it is larger than the sum of its proper divisors (39014551187).

195072755905 is an equidigital number, since it uses as much as digits as its factorization.

195072755905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39014551186.

The product of its (nonzero) digits is 4961250, while the sum is 55.

The spelling of 195072755905 in words is "one hundred ninety-five billion, seventy-two million, seven hundred fifty-five thousand, nine hundred five".