11646552421 has 8 divisors (see below), whose sum is σ = 13352336640. Its totient is φ = 9951265968.

The previous prime is 11646552403. The next prime is 11646552427. The reversal of 11646552421 is 12425564611.

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

It is not a de Polignac number, because 11646552421 - 2¹⁵ = 11646519653 is a prime.

It is a super-2 number, since 2×11646552421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11646552427) 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, 2622061 + ... + 2626498.

It is an arithmetic number, because the mean of its divisors is an integer number (1669042080).

Almost surely, 2^11646552421 is an apocalyptic number.

It is an amenable number.

11646552421 is a deficient number, since it is larger than the sum of its proper divisors (1705784219).

11646552421 is an equidigital number, since it uses as much as digits as its factorization.

11646552421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5248883.

The product of its digits is 57600, while the sum is 37.

The spelling of 11646552421 in words is "eleven billion, six hundred forty-six million, five hundred fifty-two thousand, four hundred twenty-one".