15564045042 has 192 divisors, whose sum is σ = 43238168064. Its totient is φ = 3936522240.

The previous prime is 15564045023. The next prime is 15564045067. The reversal of 15564045042 is 24054046551.

15564045042 is a `hidden beast` number, since 1 + 5 + 5 + 640 + 4 + 5 + 0 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 15564044988 and 15564045006.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4301218 + ... + 4304834.

It is an arithmetic number, because the mean of its divisors is an integer number (225198792).

Almost surely, 2^15564045042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15564045042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21619084032).

15564045042 is an abundant number, since it is smaller than the sum of its proper divisors (27674123022).

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

15564045042 is a wasteful number, since it uses less digits than its factorization.

15564045042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3753 (or 3750 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 15564045042 in words is "fifteen billion, five hundred sixty-four million, forty-five thousand, forty-two".