15541642120 has 32 divisors (see below), whose sum is σ = 34990519320. Its totient is φ = 6212776960.

The previous prime is 15541642093. The next prime is 15541642121. The reversal of 15541642120 is 2124614551.

It is a happy number.

15541642120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 13271500804 + 2270141316 = 115202^2 + 47646^2 .

It is not an unprimeable number, because it can be changed into a prime (15541642121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55921 + ... + 184960.

Almost surely, 2^15541642120 is an apocalyptic number.

15541642120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15541642120 is an abundant number, since it is smaller than the sum of its proper divisors (19448877200).

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

15541642120 is a wasteful number, since it uses less digits than its factorization.

15541642120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242505 (or 242501 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 15541642120 in words is "fifteen billion, five hundred forty-one million, six hundred forty-two thousand, one hundred twenty".