159509878749 has 32 divisors (see below), whose sum is σ = 255197779200. Its totient is φ = 97886422080.

The previous prime is 159509878733. The next prime is 159509878757. The reversal of 159509878749 is 947878905951.

It is a happy number.

159509878749 is a `hidden beast` number, since 1 + 5 + 9 + 509 + 8 + 78 + 7 + 49 = 666.

It is not a de Polignac number, because 159509878749 - 2⁴ = 159509878733 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159509878789) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 506922 + ... + 758939.

It is an arithmetic number, because the mean of its divisors is an integer number (7974930600).

Almost surely, 2^159509878749 is an apocalyptic number.

It is an amenable number.

159509878749 is a deficient number, since it is larger than the sum of its proper divisors (95687900451).

159509878749 is a wasteful number, since it uses less digits than its factorization.

159509878749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266242 (or 1266236 counting only the distinct ones).

The product of its (nonzero) digits is 228614400, while the sum is 72.

The spelling of 159509878749 in words is "one hundred fifty-nine billion, five hundred nine million, eight hundred seventy-eight thousand, seven hundred forty-nine".