11951474438 has 8 divisors (see below), whose sum is σ = 18344123688. Its totient is φ = 5836766544.

The previous prime is 11951474413. The next prime is 11951474459. The reversal of 11951474438 is 83447415911.

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

It is a junction number, because it is equal to n+sod(n) for n = 11951474392 and 11951474401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69485231 + ... + 69485402.

It is an arithmetic number, because the mean of its divisors is an integer number (2293015461).

Almost surely, 2^11951474438 is an apocalyptic number.

11951474438 is a deficient number, since it is larger than the sum of its proper divisors (6392649250).

11951474438 is a wasteful number, since it uses less digits than its factorization.

11951474438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138970678.

The product of its digits is 483840, while the sum is 47.

The spelling of 11951474438 in words is "eleven billion, nine hundred fifty-one million, four hundred seventy-four thousand, four hundred thirty-eight".