195213312492 has 96 divisors (see below), whose sum is σ = 526269649920. Its totient is φ = 55698166080.

The previous prime is 195213312461. The next prime is 195213312509. The reversal of 195213312492 is 294213312591.

It is a happy number.

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, 170043 + ... + 647565.

It is an arithmetic number, because the mean of its divisors is an integer number (5481975520).

Almost surely, 2^195213312492 is an apocalyptic number.

195213312492 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 195213312492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263134824960).

195213312492 is an abundant number, since it is smaller than the sum of its proper divisors (331056337428).

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

195213312492 is a wasteful number, since it uses less digits than its factorization.

195213312492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477723 (or 477721 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

Subtracting 195213312492 from its reverse (294213312591), we obtain a palindrome (99000000099).

It can be divided in two parts, 195213 and 312492, that added together give a palindrome (507705).

The spelling of 195213312492 in words is "one hundred ninety-five billion, two hundred thirteen million, three hundred twelve thousand, four hundred ninety-two".