156851540321 has 4 divisors (see below), whose sum is σ = 179258903232. Its totient is φ = 134444177412.

The previous prime is 156851540291. The next prime is 156851540341. The reversal of 156851540321 is 123045158651.

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: 123045158651 = 53 ⋅2321606767.

It is a cyclic number.

It is not a de Polignac number, because 156851540321 - 2¹⁰ = 156851539297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156851540341) 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 3 ways as a sum of consecutive naturals, for example, 11203681445 + ... + 11203681458.

It is an arithmetic number, because the mean of its divisors is an integer number (44814725808).

Almost surely, 2^156851540321 is an apocalyptic number.

It is an amenable number.

156851540321 is a deficient number, since it is larger than the sum of its proper divisors (22407362911).

156851540321 is an equidigital number, since it uses as much as digits as its factorization.

156851540321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22407362910.

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

Adding to 156851540321 its reverse (123045158651), we get a palindrome (279896698972).

The spelling of 156851540321 in words is "one hundred fifty-six billion, eight hundred fifty-one million, five hundred forty thousand, three hundred twenty-one".