11857989085 has 8 divisors (see below), whose sum is σ = 14231750616. Its totient is φ = 9484948800.

The previous prime is 11857989047. The next prime is 11857989103. The reversal of 11857989085 is 58098975811.

It can be written as a sum of positive squares in 4 ways, for example, as 85849 + 11857903236 = 293^2 + 108894^2 .

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

It is not a de Polignac number, because 11857989085 - 2⁷ = 11857988957 is a prime.

It is a super-2 number, since 2×11857989085² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143454 + ... + 210463.

It is an arithmetic number, because the mean of its divisors is an integer number (1778968827).

Almost surely, 2^11857989085 is an apocalyptic number.

It is an amenable number.

11857989085 is a deficient number, since it is larger than the sum of its proper divisors (2373761531).

11857989085 is an equidigital number, since it uses as much as digits as its factorization.

11857989085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360623.

The product of its (nonzero) digits is 7257600, while the sum is 61.

The spelling of 11857989085 in words is "eleven billion, eight hundred fifty-seven million, nine hundred eighty-nine thousand, eighty-five".