158618641 has 4 divisors (see below), whose sum is σ = 158645872. Its totient is φ = 158591412.

The previous prime is 158618639. The next prime is 158618657. The reversal of 158618641 is 146816851.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146816851 = 37 ⋅3968023.

It is a cyclic number.

It is not a de Polignac number, because 158618641 - 2¹ = 158618639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 158618594 and 158618603.

It is not an unprimeable number, because it can be changed into a prime (158618671) 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 3 ways as a sum of consecutive naturals, for example, 951 + ... + 17836.

It is an arithmetic number, because the mean of its divisors is an integer number (39661468).

Almost surely, 2^158618641 is an apocalyptic number.

It is an amenable number.

158618641 is a deficient number, since it is larger than the sum of its proper divisors (27231).

158618641 is an equidigital number, since it uses as much as digits as its factorization.

158618641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27230.

The product of its digits is 46080, while the sum is 40.

The square root of 158618641 is about 12594.3892666536. The cubic root of 158618641 is about 541.3166783465.

The spelling of 158618641 in words is "one hundred fifty-eight million, six hundred eighteen thousand, six hundred forty-one".