159149778 has 16 divisors (see below), whose sum is σ = 324305856. Its totient is φ = 52048880.

The previous prime is 159149773. The next prime is 159149791. The reversal of 159149778 is 877941951.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 159149778.

It is not an unprimeable number, because it can be changed into a prime (159149773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249918 + ... + 250553.

It is an arithmetic number, because the mean of its divisors is an integer number (20269116).

Almost surely, 2^159149778 is an apocalyptic number.

159149778 is an abundant number, since it is smaller than the sum of its proper divisors (165156078).

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

159149778 is a wasteful number, since it uses less digits than its factorization.

159149778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500529.

The product of its digits is 635040, while the sum is 51.

The square root of 159149778 is about 12615.4578989429. The cubic root of 159149778 is about 541.9202076588.

The spelling of 159149778 in words is "one hundred fifty-nine million, one hundred forty-nine thousand, seven hundred seventy-eight".