11520321405461 has 24 divisors (see below), whose sum is σ = 12662785582848. Its totient is φ = 10394247600000.

The previous prime is 11520321405451. The next prime is 11520321405539. The reversal of 11520321405461 is 16450412302511.

It is a happy number.

It is not a de Polignac number, because 11520321405461 - 2¹⁴ = 11520321389077 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 (11520321405451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174647036 + ... + 174712986.

It is an arithmetic number, because the mean of its divisors is an integer number (527616065952).

Almost surely, 2^{11520321405461} is an apocalyptic number.

11520321405461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11520321405461 is a deficient number, since it is larger than the sum of its proper divisors (1142464177387).

11520321405461 is an equidigital number, since it uses as much as digits as its factorization.

11520321405461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66761 (or 66562 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 11520321405461 its reverse (16450412302511), we get a palindrome (27970733707972).

The spelling of 11520321405461 in words is "eleven trillion, five hundred twenty billion, three hundred twenty-one million, four hundred five thousand, four hundred sixty-one".