11949275643 has 8 divisors (see below), whose sum is σ = 16232978448. Its totient is φ = 7815878304.

The previous prime is 11949275621. The next prime is 11949275651. The reversal of 11949275643 is 34657294911.

It is a happy number.

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

It is not a de Polignac number, because 11949275643 - 2⁹ = 11949275131 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (11949271643) 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, 37576180 + ... + 37576497.

It is an arithmetic number, because the mean of its divisors is an integer number (2029122306).

Almost surely, 2^11949275643 is an apocalyptic number.

11949275643 is a deficient number, since it is larger than the sum of its proper divisors (4283702805).

11949275643 is an equidigital number, since it uses as much as digits as its factorization.

11949275643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75152733.

The product of its digits is 1632960, while the sum is 51.

The spelling of 11949275643 in words is "eleven billion, nine hundred forty-nine million, two hundred seventy-five thousand, six hundred forty-three".