158165478 has 24 divisors (see below), whose sum is σ = 354510000. Its totient is φ = 50903664.

The previous prime is 158165429. The next prime is 158165521. The reversal of 158165478 is 874561851.

158165478 is a `hidden beast` number, since 1 + 581 + 65 + 4 + 7 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150978 + ... + 152021.

It is an arithmetic number, because the mean of its divisors is an integer number (14771250).

Almost surely, 2^158165478 is an apocalyptic number.

158165478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

158165478 is an abundant number, since it is smaller than the sum of its proper divisors (196344522).

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

158165478 is a wasteful number, since it uses less digits than its factorization.

158165478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303036 (or 303033 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The square root of 158165478 is about 12576.3857288173. The cubic root of 158165478 is about 540.8006846266.

The spelling of 158165478 in words is "one hundred fifty-eight million, one hundred sixty-five thousand, four hundred seventy-eight".