12209154840 has 64 divisors (see below), whose sum is σ = 40697186400. Its totient is φ = 3255774336.

The previous prime is 12209154829. The next prime is 12209154869. The reversal of 12209154840 is 4845190221.

12209154840 is a `hidden beast` number, since 1 + 2 + 20 + 91 + 548 + 4 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 12209154795 and 12209154804.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5651307 + ... + 5653466.

Almost surely, 2^12209154840 is an apocalyptic number.

12209154840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12209154840 is an abundant number, since it is smaller than the sum of its proper divisors (28488031560).

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

12209154840 is a wasteful number, since it uses less digits than its factorization.

12209154840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11304793 (or 11304783 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 12209154840 in words is "twelve billion, two hundred nine million, one hundred fifty-four thousand, eight hundred forty".