158405945 has 16 divisors (see below), whose sum is σ = 208794240. Its totient is φ = 114833664.

The previous prime is 158405921. The next prime is 158405953. The reversal of 158405945 is 549504851.

It is a de Polignac number, because none of the positive numbers 2^k-158405945 is a prime.

It is a super-2 number, since 2×158405945² = 50184886822686050, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 34064 + ... + 38433.

It is an arithmetic number, because the mean of its divisors is an integer number (13049640).

Almost surely, 2^158405945 is an apocalyptic number.

It is an amenable number.

158405945 is a deficient number, since it is larger than the sum of its proper divisors (50388295).

158405945 is a wasteful number, since it uses less digits than its factorization.

158405945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72544.

The product of its (nonzero) digits is 144000, while the sum is 41.

The square root of 158405945 is about 12585.9423564547. The cubic root of 158405945 is about 541.0746147555.

The spelling of 158405945 in words is "one hundred fifty-eight million, four hundred five thousand, nine hundred forty-five".