158109555 has 8 divisors (see below), whose sum is σ = 252975312. Its totient is φ = 84325088.

The previous prime is 158109527. The next prime is 158109559. The reversal of 158109555 is 555901851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 158109555 - 2⁶ = 158109491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158109559) 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, 5270304 + ... + 5270333.

It is an arithmetic number, because the mean of its divisors is an integer number (31621914).

Almost surely, 2^158109555 is an apocalyptic number.

158109555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

158109555 is a deficient number, since it is larger than the sum of its proper divisors (94865757).

158109555 is a wasteful number, since it uses less digits than its factorization.

158109555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10540645.

The product of its (nonzero) digits is 45000, while the sum is 39.

The square root of 158109555 is about 12574.1621987312. The cubic root of 158109555 is about 540.7369396549.

The spelling of 158109555 in words is "one hundred fifty-eight million, one hundred nine thousand, five hundred fifty-five".