195429461987 has 16 divisors (see below), whose sum is σ = 205468060512. Its totient is φ = 185645053440.

The previous prime is 195429461957. The next prime is 195429462031. The reversal of 195429461987 is 789164924591.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195429461987 is a prime.

It is a super-2 number, since 2×195429461987² (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 (195429461957) 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, 3820037 + ... + 3870857.

It is an arithmetic number, because the mean of its divisors is an integer number (12841753782).

Almost surely, 2^195429461987 is an apocalyptic number.

195429461987 is a deficient number, since it is larger than the sum of its proper divisors (10038598525).

195429461987 is a wasteful number, since it uses less digits than its factorization.

195429461987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53318.

The product of its digits is 39191040, while the sum is 65.

The spelling of 195429461987 in words is "one hundred ninety-five billion, four hundred twenty-nine million, four hundred sixty-one thousand, nine hundred eighty-seven".