11543520451 has 8 divisors (see below), whose sum is σ = 11790901440. Its totient is φ = 11297863848.

The previous prime is 11543520449. The next prime is 11543520467. The reversal of 11543520451 is 15402534511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11543520451 - 2¹ = 11543520449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11543520431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417561 + ... + 444346.

It is an arithmetic number, because the mean of its divisors is an integer number (1473862680).

Almost surely, 2^11543520451 is an apocalyptic number.

11543520451 is a deficient number, since it is larger than the sum of its proper divisors (247380989).

11543520451 is an equidigital number, since it uses as much as digits as its factorization.

11543520451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862193.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 11543520451 in words is "eleven billion, five hundred forty-three million, five hundred twenty thousand, four hundred fifty-one".