15859949040 has 640 divisors, whose sum is σ = 62862643200. Its totient is φ = 3688436736.

The previous prime is 15859949011. The next prime is 15859949047. The reversal of 15859949040 is 4094995851.

15859949040 is a `hidden beast` number, since 1 + 5 + 8 + 599 + 4 + 9 + 0 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15859949047) 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 127 ways as a sum of consecutive naturals, for example, 43214937 + ... + 43215303.

It is an arithmetic number, because the mean of its divisors is an integer number (98222880).

Almost surely, 2^15859949040 is an apocalyptic number.

15859949040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15859949040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31431321600).

15859949040 is an abundant number, since it is smaller than the sum of its proper divisors (47002694160).

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

15859949040 is a wasteful number, since it uses less digits than its factorization.

15859949040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 54.

The spelling of 15859949040 in words is "fifteen billion, eight hundred fifty-nine million, nine hundred forty-nine thousand, forty".