195747920772 has 96 divisors (see below), whose sum is σ = 483200750592. Its totient is φ = 61551152256.

The previous prime is 195747920713. The next prime is 195747920773. The reversal of 195747920772 is 277029747591.

It is a super-2 number, since 2×195747920772² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (195747920773) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13439718 + ... + 13454274.

It is an arithmetic number, because the mean of its divisors is an integer number (5033341152).

Almost surely, 2^195747920772 is an apocalyptic number.

195747920772 is a gapful number since it is divisible by the number (12) 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 195747920772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241600375296).

195747920772 is an abundant number, since it is smaller than the sum of its proper divisors (287452829820).

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

195747920772 is a wasteful number, since it uses less digits than its factorization.

195747920772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15257 (or 15255 counting only the distinct ones).

The product of its (nonzero) digits is 15558480, while the sum is 60.

The spelling of 195747920772 in words is "one hundred ninety-five billion, seven hundred forty-seven million, nine hundred twenty thousand, seven hundred seventy-two".