1163451146521 has 4 divisors (see below), whose sum is σ = 1163460801844. Its totient is φ = 1163441491200.

The previous prime is 1163451146513. The next prime is 1163451146551. The reversal of 1163451146521 is 1256411543611.

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

It can be written as a sum of positive squares in 2 ways, for example, as 480408403225 + 683042743296 = 693115^2 + 826464^2 .

It is a cyclic number.

It is not a de Polignac number, because 1163451146521 - 2³ = 1163451146513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1163451146551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4644600 + ... + 4888681.

It is an arithmetic number, because the mean of its divisors is an integer number (290865200461).

Almost surely, 2^{1163451146521} is an apocalyptic number.

It is an amenable number.

1163451146521 is a deficient number, since it is larger than the sum of its proper divisors (9655323).

1163451146521 is an equidigital number, since it uses as much as digits as its factorization.

1163451146521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9655322.

The product of its digits is 86400, while the sum is 40.

The spelling of 1163451146521 in words is "one trillion, one hundred sixty-three billion, four hundred fifty-one million, one hundred forty-six thousand, five hundred twenty-one".