195189827640 has 64 divisors (see below), whose sum is σ = 595169004960. Its totient is φ = 51197329920.

The previous prime is 195189827593. The next prime is 195189827641. The reversal of 195189827640 is 46728981591.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195189827641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13325319 + ... + 13339958.

Almost surely, 2^195189827640 is an apocalyptic number.

195189827640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195189827640 is an abundant number, since it is smaller than the sum of its proper divisors (399979177320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

195189827640 is a wasteful number, since it uses less digits than its factorization.

195189827640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26665352 (or 26665348 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 60.

The spelling of 195189827640 in words is "one hundred ninety-five billion, one hundred eighty-nine million, eight hundred twenty-seven thousand, six hundred forty".