156209140297 has 4 divisors (see below), whose sum is σ = 178524731776. Its totient is φ = 133893548820.

The previous prime is 156209140267. The next prime is 156209140331. The reversal of 156209140297 is 792041902651.

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.

It is a cyclic number.

It is not a de Polignac number, because 156209140297 - 2¹⁹ = 156208616009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156209140207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11157795729 + ... + 11157795742.

It is an arithmetic number, because the mean of its divisors is an integer number (44631182944).

Almost surely, 2^156209140297 is an apocalyptic number.

It is an amenable number.

156209140297 is a deficient number, since it is larger than the sum of its proper divisors (22315591479).

156209140297 is an equidigital number, since it uses as much as digits as its factorization.

156209140297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22315591478.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 156209140297 in words is "one hundred fifty-six billion, two hundred nine million, one hundred forty thousand, two hundred ninety-seven".