1320811826372 has 12 divisors (see below), whose sum is σ = 2447386619580. Its totient is φ = 621558506496.

The previous prime is 1320811826371. The next prime is 1320811826377. The reversal of 1320811826372 is 2736281180231.

It can be written as a sum of positive squares in 2 ways, for example, as 363830937856 + 956980888516 = 603184^2 + 978254^2 .

It is not an unprimeable number, because it can be changed into a prime (1320811826371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9711851597 + ... + 9711851732.

It is an arithmetic number, because the mean of its divisors is an integer number (203948884965).

Almost surely, 2^{1320811826372} is an apocalyptic number.

It is an amenable number.

1320811826372 is a deficient number, since it is larger than the sum of its proper divisors (1126574793208).

1320811826372 is a wasteful number, since it uses less digits than its factorization.

1320811826372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19423703350 (or 19423703348 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 1320811826372 in words is "one trillion, three hundred twenty billion, eight hundred eleven million, eight hundred twenty-six thousand, three hundred seventy-two".