158138805 has 64 divisors (see below), whose sum is σ = 294958080. Its totient is φ = 71539200.

The previous prime is 158138789. The next prime is 158138807. The reversal of 158138805 is 508831851.

It is not a de Polignac number, because 158138805 - 2⁴ = 158138789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158138807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 228510 + ... + 229200.

It is an arithmetic number, because the mean of its divisors is an integer number (4608720).

Almost surely, 2^158138805 is an apocalyptic number.

158138805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

158138805 is a deficient number, since it is larger than the sum of its proper divisors (136819275).

158138805 is a wasteful number, since it uses less digits than its factorization.

158138805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802.

The product of its (nonzero) digits is 38400, while the sum is 39.

The square root of 158138805 is about 12575.3252443028. The cubic root of 158138805 is about 540.7702827383.

The spelling of 158138805 in words is "one hundred fifty-eight million, one hundred thirty-eight thousand, eight hundred five".