11621431067 has 4 divisors (see below), whose sum is σ = 11624727720. Its totient is φ = 11618134416.

The previous prime is 11621431057. The next prime is 11621431069. The reversal of 11621431067 is 76013412611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76013412611 = 29 ⋅2621152159.

It is a cyclic number.

It is not a de Polignac number, because 11621431067 - 2⁸ = 11621430811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11621431069) 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, 1643033 + ... + 1650090.

It is an arithmetic number, because the mean of its divisors is an integer number (2906181930).

Almost surely, 2^11621431067 is an apocalyptic number.

11621431067 is a deficient number, since it is larger than the sum of its proper divisors (3296653).

11621431067 is an equidigital number, since it uses as much as digits as its factorization.

11621431067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3296652.

The product of its (nonzero) digits is 6048, while the sum is 32.

Adding to 11621431067 its reverse (76013412611), we get a palindrome (87634843678).

The spelling of 11621431067 in words is "eleven billion, six hundred twenty-one million, four hundred thirty-one thousand, sixty-seven".