156681841 has 4 divisors (see below), whose sum is σ = 156803392. Its totient is φ = 156560292.

The previous prime is 156681827. The next prime is 156681851. The reversal of 156681841 is 148186651.

156681841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 148186651 = 337 ⋅439723.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156681841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 156681794 and 156681803.

It is not an unprimeable number, because it can be changed into a prime (156681851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58821 + ... + 61426.

It is an arithmetic number, because the mean of its divisors is an integer number (39200848).

Almost surely, 2^156681841 is an apocalyptic number.

It is an amenable number.

156681841 is a deficient number, since it is larger than the sum of its proper divisors (121551).

156681841 is a wasteful number, since it uses less digits than its factorization.

156681841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121550.

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

The square root of 156681841 is about 12517.2617213191. The cubic root of 156681841 is about 539.1044151364.

The spelling of 156681841 in words is "one hundred fifty-six million, six hundred eighty-one thousand, eight hundred forty-one".