11621475649 has 4 divisors (see below), whose sum is σ = 13281686464. Its totient is φ = 9961264836.

The previous prime is 11621475643. The next prime is 11621475659. The reversal of 11621475649 is 94657412611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94657412611 = 43 ⋅2201335177.

It is a cyclic number.

It is not a de Polignac number, because 11621475649 - 2⁹ = 11621475137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11621475599 and 11621475608.

It is not an unprimeable number, because it can be changed into a prime (11621475643) 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, 830105397 + ... + 830105410.

It is an arithmetic number, because the mean of its divisors is an integer number (3320421616).

Almost surely, 2^11621475649 is an apocalyptic number.

It is an amenable number.

11621475649 is a deficient number, since it is larger than the sum of its proper divisors (1660210815).

11621475649 is an equidigital number, since it uses as much as digits as its factorization.

11621475649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660210814.

The product of its digits is 362880, while the sum is 46.

The spelling of 11621475649 in words is "eleven billion, six hundred twenty-one million, four hundred seventy-five thousand, six hundred forty-nine".