11861071544 has 16 divisors (see below), whose sum is σ = 25416582000. Its totient is φ = 5083316352.

The previous prime is 11861071531. The next prime is 11861071619. The reversal of 11861071544 is 44517016811.

It is a junction number, because it is equal to n+sod(n) for n = 11861071498 and 11861071507.

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, 105902369 + ... + 105902480.

It is an arithmetic number, because the mean of its divisors is an integer number (1588536375).

Almost surely, 2^11861071544 is an apocalyptic number.

11861071544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

11861071544 is an abundant number, since it is smaller than the sum of its proper divisors (13555510456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11861071544 is a wasteful number, since it uses less digits than its factorization.

11861071544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211804862 (or 211804858 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 38.

The spelling of 11861071544 in words is "eleven billion, eight hundred sixty-one million, seventy-one thousand, five hundred forty-four".