15981240075 has 48 divisors (see below), whose sum is σ = 27660134400. Its totient is φ = 8126426880.

The previous prime is 15981240073. The next prime is 15981240083. The reversal of 15981240075 is 57004218951.

It is not a de Polignac number, because 15981240075 - 2¹ = 15981240073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15981240071) 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 47 ways as a sum of consecutive naturals, for example, 525126 + ... + 554724.

It is an arithmetic number, because the mean of its divisors is an integer number (576252800).

Almost surely, 2^15981240075 is an apocalyptic number.

15981240075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15981240075 is a deficient number, since it is larger than the sum of its proper divisors (11678894325).

15981240075 is a wasteful number, since it uses less digits than its factorization.

15981240075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29948 (or 29943 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 42.

The spelling of 15981240075 in words is "fifteen billion, nine hundred eighty-one million, two hundred forty thousand, seventy-five".