11949478951 has 8 divisors (see below), whose sum is σ = 12433984704. Its totient is φ = 11474567520.

The previous prime is 11949478921. The next prime is 11949478963. The reversal of 11949478951 is 15987494911.

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

It is a cyclic number.

It is not a de Polignac number, because 11949478951 - 2⁹ = 11949478439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11949478921) 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, 2396040 + ... + 2401021.

It is an arithmetic number, because the mean of its divisors is an integer number (1554248088).

Almost surely, 2^11949478951 is an apocalyptic number.

11949478951 is a deficient number, since it is larger than the sum of its proper divisors (484505753).

11949478951 is an equidigital number, since it uses as much as digits as its factorization.

11949478951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4797161.

The product of its digits is 3265920, while the sum is 58.

The spelling of 11949478951 in words is "eleven billion, nine hundred forty-nine million, four hundred seventy-eight thousand, nine hundred fifty-one".