11504452435421 has 10 divisors (see below), whose sum is σ = 12654819118110. Its totient is φ = 10458593109800.

The previous prime is 11504452435391. The next prime is 11504452435439. The reversal of 11504452435421 is 12453425440511.

It can be written as a sum of positive squares in only one way, i.e., 8316959959396 + 3187492476025 = 2883914^2 + 1785355^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11504452435421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11504452435471) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 392870150 + ... + 392899431.

It is an arithmetic number, because the mean of its divisors is an integer number (1265481911811).

Almost surely, 2^{11504452435421} is an apocalyptic number.

11504452435421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11504452435421 is a deficient number, since it is larger than the sum of its proper divisors (1150366682689).

11504452435421 is an frugal number, since it uses more digits than its factorization.

11504452435421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785769625 (or 785769592 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 41.

Adding to 11504452435421 its reverse (12453425440511), we get a palindrome (23957877875932).

The spelling of 11504452435421 in words is "eleven trillion, five hundred four billion, four hundred fifty-two million, four hundred thirty-five thousand, four hundred twenty-one".