11481867621 has 36 divisors (see below), whose sum is σ = 19404309132. Its totient is φ = 6523098624.

The previous prime is 11481867613. The next prime is 11481867641. The reversal of 11481867621 is 12676818411.

11481867621 is a `hidden beast` number, since 1 + 1 + 4 + 8 + 18 + 6 + 7 + 621 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5310036900 + 6171830721 = 72870^2 + 78561^2 .

It is not a de Polignac number, because 11481867621 - 2³ = 11481867613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11481867641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1045 + ... + 151541.

It is an arithmetic number, because the mean of its divisors is an integer number (539008587).

Almost surely, 2^11481867621 is an apocalyptic number.

It is an amenable number.

11481867621 is a deficient number, since it is larger than the sum of its proper divisors (7922441511).

11481867621 is a wasteful number, since it uses less digits than its factorization.

11481867621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150690 (or 150680 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The spelling of 11481867621 in words is "eleven billion, four hundred eighty-one million, eight hundred sixty-seven thousand, six hundred twenty-one".