11391203957 has 8 divisors (see below), whose sum is σ = 13784314176. Its totient is φ = 9189542592.

The previous prime is 11391203947. The next prime is 11391203959. The reversal of 11391203957 is 75930219311.

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 11391203957 - 2⁸ = 11391203701 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 (11391203959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47862083 + ... + 47862320.

It is an arithmetic number, because the mean of its divisors is an integer number (1723039272).

Almost surely, 2^11391203957 is an apocalyptic number.

11391203957 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11391203957 is a deficient number, since it is larger than the sum of its proper divisors (2393110219).

11391203957 is an equidigital number, since it uses as much as digits as its factorization.

11391203957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95724427.

The product of its (nonzero) digits is 51030, while the sum is 41.

The spelling of 11391203957 in words is "eleven billion, three hundred ninety-one million, two hundred three thousand, nine hundred fifty-seven".