1326511980554 has 4 divisors (see below), whose sum is σ = 1989767970834. Its totient is φ = 663255990276.

The previous prime is 1326511980533. The next prime is 1326511980583. The reversal of 1326511980554 is 4550891156231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1097958187225 + 228553793329 = 1047835^2 + 478073^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331627995137 + ... + 331627995140.

Almost surely, 2^{1326511980554} is an apocalyptic number.

1326511980554 is a deficient number, since it is larger than the sum of its proper divisors (663255990280).

1326511980554 is an equidigital number, since it uses as much as digits as its factorization.

1326511980554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663255990279.

The product of its (nonzero) digits is 1296000, while the sum is 50.

The spelling of 1326511980554 in words is "one trillion, three hundred twenty-six billion, five hundred eleven million, nine hundred eighty thousand, five hundred fifty-four".