158640545 has 32 divisors (see below), whose sum is σ = 232353792. Its totient is φ = 101610432.

The previous prime is 158640541. The next prime is 158640563. The reversal of 158640545 is 545046851.

It is a happy number.

It is not a de Polignac number, because 158640545 - 2² = 158640541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 158640499 and 158640508.

It is not an unprimeable number, because it can be changed into a prime (158640541) 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 31 ways as a sum of consecutive naturals, for example, 32324 + ... + 36906.

It is an arithmetic number, because the mean of its divisors is an integer number (7261056).

Almost surely, 2^158640545 is an apocalyptic number.

It is an amenable number.

158640545 is a deficient number, since it is larger than the sum of its proper divisors (73713247).

158640545 is a wasteful number, since it uses less digits than its factorization.

158640545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4661.

The product of its (nonzero) digits is 96000, while the sum is 38.

The square root of 158640545 is about 12595.2588302107. The cubic root of 158640545 is about 541.3415944066.

The spelling of 158640545 in words is "one hundred fifty-eight million, six hundred forty thousand, five hundred forty-five".