158638005 has 24 divisors (see below), whose sum is σ = 283845120. Its totient is φ = 81876960.

The previous prime is 158637991. The next prime is 158638027. The reversal of 158638005 is 500836851.

158638005 is a `hidden beast` number, since 15 + 8 + 638 + 0 + 0 + 5 = 666.

It is not a de Polignac number, because 158638005 - 2⁴ = 158637989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55465 + ... + 58254.

It is an arithmetic number, because the mean of its divisors is an integer number (11826880).

Almost surely, 2^158638005 is an apocalyptic number.

158638005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

158638005 is a deficient number, since it is larger than the sum of its proper divisors (125207115).

158638005 is a wasteful number, since it uses less digits than its factorization.

158638005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113761 (or 113758 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 158638005 is about 12595.1579982150. The cubic root of 158638005 is about 541.3387052440.

The spelling of 158638005 in words is "one hundred fifty-eight million, six hundred thirty-eight thousand, five".