195421009056 has 192 divisors, whose sum is σ = 631668473856. Its totient is φ = 51514444800.

The previous prime is 195421009033. The next prime is 195421009067. The reversal of 195421009056 is 650900124591.

It is a super-2 number, since 2×195421009056² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 195421008999 and 195421009017.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23853921 + ... + 23862111.

It is an arithmetic number, because the mean of its divisors is an integer number (3289939968).

Almost surely, 2^195421009056 is an apocalyptic number.

195421009056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195421009056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315834236928).

195421009056 is an abundant number, since it is smaller than the sum of its proper divisors (436247464800).

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

195421009056 is a wasteful number, since it uses less digits than its factorization.

195421009056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10955 (or 10947 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 42.

The spelling of 195421009056 in words is "one hundred ninety-five billion, four hundred twenty-one million, nine thousand, fifty-six".