1325820819520 has 28 divisors (see below), whose sum is σ = 3157110827244. Its totient is φ = 530328327680.

The previous prime is 1325820819509. The next prime is 1325820819539. The reversal of 1325820819520 is 259180285231.

It can be written as a sum of positive squares in 2 ways, for example, as 423655188544 + 902165630976 = 650888^2 + 949824^2 .

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2071594711 + ... + 2071595350.

Almost surely, 2^{1325820819520} is an apocalyptic number.

1325820819520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1325820819520 is an abundant number, since it is smaller than the sum of its proper divisors (1831290007724).

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

1325820819520 is an equidigital number, since it uses as much as digits as its factorization.

1325820819520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4143190078 (or 4143190068 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 1325820819520 in words is "one trillion, three hundred twenty-five billion, eight hundred twenty million, eight hundred nineteen thousand, five hundred twenty".