15780856038 has 64 divisors (see below), whose sum is σ = 32622912000. Its totient is φ = 5086771200.

The previous prime is 15780856037. The next prime is 15780856081. The reversal of 15780856038 is 83065808751.

15780856038 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15780856031) 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 31 ways as a sum of consecutive naturals, for example, 12966406 + ... + 12967622.

It is an arithmetic number, because the mean of its divisors is an integer number (509733000).

Almost surely, 2^15780856038 is an apocalyptic number.

15780856038 is an abundant number, since it is smaller than the sum of its proper divisors (16842055962).

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

15780856038 is a wasteful number, since it uses less digits than its factorization.

15780856038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853.

The product of its (nonzero) digits is 1612800, while the sum is 51.

The spelling of 15780856038 in words is "fifteen billion, seven hundred eighty million, eight hundred fifty-six thousand, thirty-eight".