158978155 has 32 divisors (see below), whose sum is σ = 223534080. Its totient is φ = 106293120.

The previous prime is 158978147. The next prime is 158978167. The reversal of 158978155 is 551879851.

It is not a de Polignac number, because 158978155 - 2³ = 158978147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 158978099 and 158978108.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 344625 + ... + 345085.

It is an arithmetic number, because the mean of its divisors is an integer number (6985440).

Almost surely, 2^158978155 is an apocalyptic number.

158978155 is a deficient number, since it is larger than the sum of its proper divisors (64555925).

158978155 is a wasteful number, since it uses less digits than its factorization.

158978155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699.

The product of its digits is 504000, while the sum is 49.

The square root of 158978155 is about 12608.6539725698. The cubic root of 158978155 is about 541.7253400217.

The spelling of 158978155 in words is "one hundred fifty-eight million, nine hundred seventy-eight thousand, one hundred fifty-five".