197427719348440 has 96 divisors (see below), whose sum is σ = 516744503225280. Its totient is φ = 67688499529728.

The previous prime is 197427719348417. The next prime is 197427719348443. The reversal of 197427719348440 is 44843917724791.

It is a Harshad number since it is a multiple of its sum of digits (70).

It is a self number, because there is not a number n which added to its sum of digits gives 197427719348440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197427719348443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137964049 + ... + 139387711.

It is an arithmetic number, because the mean of its divisors is an integer number (5382755241930).

Almost surely, 2^{197427719348440} is an apocalyptic number.

197427719348440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197427719348440 is an abundant number, since it is smaller than the sum of its proper divisors (319316783876840).

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

197427719348440 is a wasteful number, since it uses less digits than its factorization.

197427719348440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494441 (or 1494430 counting only the distinct ones).

The product of its (nonzero) digits is 341397504, while the sum is 70.

The spelling of 197427719348440 in words is "one hundred ninety-seven trillion, four hundred twenty-seven billion, seven hundred nineteen million, three hundred forty-eight thousand, four hundred forty".