195752997520 has 20 divisors (see below), whose sum is σ = 455125719420. Its totient is φ = 78301198976.

The previous prime is 195752997511. The next prime is 195752997523. The reversal of 195752997520 is 25799257591.

It can be written as a sum of positive squares in 2 ways, for example, as 102779230464 + 92973767056 = 320592^2 + 304916^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (195752997523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1223456155 + ... + 1223456314.

It is an arithmetic number, because the mean of its divisors is an integer number (22756285971).

Almost surely, 2^195752997520 is an apocalyptic number.

195752997520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195752997520 is an abundant number, since it is smaller than the sum of its proper divisors (259372721900).

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

195752997520 is a wasteful number, since it uses less digits than its factorization.

195752997520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446912482 (or 2446912476 counting only the distinct ones).

The product of its (nonzero) digits is 17860500, while the sum is 61.

The spelling of 195752997520 in words is "one hundred ninety-five billion, seven hundred fifty-two million, nine hundred ninety-seven thousand, five hundred twenty".