158138761 has 8 divisors (see below), whose sum is σ = 172950048. Its totient is φ = 143400000.

The previous prime is 158138759. The next prime is 158138789. The reversal of 158138761 is 167831851.

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 158138761 - 2¹ = 158138759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158138741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13515 + ... + 22336.

It is an arithmetic number, because the mean of its divisors is an integer number (21618756).

Almost surely, 2^158138761 is an apocalyptic number.

158138761 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

158138761 is a deficient number, since it is larger than the sum of its proper divisors (14811287).

158138761 is a wasteful number, since it uses less digits than its factorization.

158138761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36263.

The product of its digits is 40320, while the sum is 40.

The square root of 158138761 is about 12575.3234948450. The cubic root of 158138761 is about 540.7702325843.

The spelling of 158138761 in words is "one hundred fifty-eight million, one hundred thirty-eight thousand, seven hundred sixty-one".