197828615961250 has 40 divisors (see below), whose sum is σ = 370987468618140. Its totient is φ = 79093565280000.

The previous prime is 197828615961181. The next prime is 197828615961289. The reversal of 197828615961250 is 52169516828791.

It can be written as a sum of positive squares in 10 ways, for example, as 4189730015689 + 193638885945561 = 2046883^2 + 13915419^2 .

It is a super-2 number, since 2×197828615961250² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (70) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 197828615961250.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35268811 + ... + 40491310.

Almost surely, 2^{197828615961250} is an apocalyptic number.

197828615961250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197828615961250 is a deficient number, since it is larger than the sum of its proper divisors (173158852656890).

197828615961250 is an equidigital number, since it uses as much as digits as its factorization.

197828615961250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75762232 (or 75762217 counting only the distinct ones).

The product of its (nonzero) digits is 130636800, while the sum is 70.

The spelling of 197828615961250 in words is "one hundred ninety-seven trillion, eight hundred twenty-eight billion, six hundred fifteen million, nine hundred sixty-one thousand, two hundred fifty".