11851539091 has 8 divisors (see below), whose sum is σ = 13555755360. Its totient is φ = 10150107648.

The previous prime is 11851539083. The next prime is 11851539131. The reversal of 11851539091 is 19093515811.

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 11851539091 - 2³ = 11851539083 is a prime.

It is a super-2 number, since 2×11851539091² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11851539031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 687076 + ... + 704113.

It is an arithmetic number, because the mean of its divisors is an integer number (1694469420).

Almost surely, 2^11851539091 is an apocalyptic number.

11851539091 is a deficient number, since it is larger than the sum of its proper divisors (1704216269).

11851539091 is a wasteful number, since it uses less digits than its factorization.

11851539091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392413.

The product of its (nonzero) digits is 48600, while the sum is 43.

The spelling of 11851539091 in words is "eleven billion, eight hundred fifty-one million, five hundred thirty-nine thousand, ninety-one".