195109963139 has 16 divisors (see below), whose sum is σ = 246625487808. Its totient is φ = 150200479872.

The previous prime is 195109963109. The next prime is 195109963177. The reversal of 195109963139 is 931369901591.

It is a cyclic number.

It is not a de Polignac number, because 195109963139 - 2³² = 190814995843 is a prime.

It is a super-2 number, since 2×195109963139² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (195109963109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28970492 + ... + 28977225.

It is an arithmetic number, because the mean of its divisors is an integer number (15414092988).

Almost surely, 2^195109963139 is an apocalyptic number.

195109963139 is a deficient number, since it is larger than the sum of its proper divisors (51515524669).

195109963139 is a wasteful number, since it uses less digits than its factorization.

195109963139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57947774.

The product of its (nonzero) digits is 1771470, while the sum is 56.

The spelling of 195109963139 in words is "one hundred ninety-five billion, one hundred nine million, nine hundred sixty-three thousand, one hundred thirty-nine".