195390520900 has 27 divisors (see below), whose sum is σ = 424007022621. Its totient is φ = 78154440240.

The previous prime is 195390520889. The next prime is 195390520933. The reversal of 195390520900 is 9025093591.

The square root of 195390520900 is 442030.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 70340587524 + 125049933376 = 265218^2 + 353624^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4398199 + ... + 4442401.

Almost surely, 2^195390520900 is an apocalyptic number.

195390520900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195390520900 is the 442030-th square number.

It is an amenable number.

195390520900 is an abundant number, since it is smaller than the sum of its proper divisors (228616501721).

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

195390520900 is an frugal number, since it uses more digits than its factorization.

195390520900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88420 (or 44210 counting only the distinct ones).

The product of its (nonzero) digits is 109350, while the sum is 43.

The spelling of 195390520900 in words is "one hundred ninety-five billion, three hundred ninety million, five hundred twenty thousand, nine hundred".