11641487820 has 48 divisors (see below), whose sum is σ = 32605617408. Its totient is φ = 3103496640.

The previous prime is 11641487791. The next prime is 11641487821. The reversal of 11641487820 is 2878414611.

It is not an unprimeable number, because it can be changed into a prime (11641487821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195177 + ... + 247743.

It is an arithmetic number, because the mean of its divisors is an integer number (679283696).

Almost surely, 2^11641487820 is an apocalyptic number.

11641487820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11641487820 is an abundant number, since it is smaller than the sum of its proper divisors (20964129588).

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

11641487820 is a wasteful number, since it uses less digits than its factorization.

11641487820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56270 (or 56268 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The spelling of 11641487820 in words is "eleven billion, six hundred forty-one million, four hundred eighty-seven thousand, eight hundred twenty".