11953858010891 has 4 divisors (see below), whose sum is σ = 11959284185592. Its totient is φ = 11948431836192.

The previous prime is 11953858010851. The next prime is 11953858010903. The reversal of 11953858010891 is 19801085835911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11953858010891 is a prime.

It is a super-3 number, since 3×11953858010891³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11953858010891.

It is not an unprimeable number, because it can be changed into a prime (11953858010851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2713084046 + ... + 2713088451.

It is an arithmetic number, because the mean of its divisors is an integer number (2989821046398).

Almost surely, 2^{11953858010891} is an apocalyptic number.

11953858010891 is a deficient number, since it is larger than the sum of its proper divisors (5426174701).

11953858010891 is an equidigital number, since it uses as much as digits as its factorization.

11953858010891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5426174700.

The product of its (nonzero) digits is 3110400, while the sum is 59.

The spelling of 11953858010891 in words is "eleven trillion, nine hundred fifty-three billion, eight hundred fifty-eight million, ten thousand, eight hundred ninety-one".