195621456 has 20 divisors (see below), whose sum is σ = 505355552. Its totient is φ = 65207136.

The previous prime is 195621451. The next prime is 195621457. The reversal of 195621456 is 654126591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195621451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2037676 + ... + 2037771.

Almost surely, 2^195621456 is an apocalyptic number.

195621456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

195621456 is an abundant number, since it is smaller than the sum of its proper divisors (309734096).

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

195621456 is a wasteful number, since it uses less digits than its factorization.

195621456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4075458 (or 4075452 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 195621456 is about 13986.4740374406. The cubic root of 195621456 is about 580.5043729978.

The spelling of 195621456 in words is "one hundred ninety-five million, six hundred twenty-one thousand, four hundred fifty-six".