1321502011648 has 72 divisors (see below), whose sum is σ = 3246574710848. Its totient is φ = 522791995392.

The previous prime is 1321502011631. The next prime is 1321502011691. The reversal of 1321502011648 is 8461102051231.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28339986 + ... + 28386577.

Almost surely, 2^{1321502011648} is an apocalyptic number.

It is an amenable number.

1321502011648 is an abundant number, since it is smaller than the sum of its proper divisors (1925072699200).

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

1321502011648 is an equidigital number, since it uses as much as digits as its factorization.

1321502011648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56726599 (or 56726585 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

Adding to 1321502011648 its reverse (8461102051231), we get a palindrome (9782604062879).

The spelling of 1321502011648 in words is "one trillion, three hundred twenty-one billion, five hundred two million, eleven thousand, six hundred forty-eight".