11642321451 has 4 divisors (see below), whose sum is σ = 15523095272. Its totient is φ = 7761547632.

The previous prime is 11642321413. The next prime is 11642321507. The reversal of 11642321451 is 15412324611.

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

It is not a de Polignac number, because 11642321451 - 2⁹ = 11642320939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11642321651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1940386906 + ... + 1940386911.

It is an arithmetic number, because the mean of its divisors is an integer number (3880773818).

Almost surely, 2^11642321451 is an apocalyptic number.

11642321451 is a deficient number, since it is larger than the sum of its proper divisors (3880773821).

11642321451 is an equidigital number, since it uses as much as digits as its factorization.

11642321451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3880773820.

The product of its digits is 5760, while the sum is 30.

The spelling of 11642321451 in words is "eleven billion, six hundred forty-two million, three hundred twenty-one thousand, four hundred fifty-one".