161156010140403 has 4 divisors (see below), whose sum is σ = 214874680187208. Its totient is φ = 107437340093600.

The previous prime is 161156010140399. The next prime is 161156010140479. The reversal of 161156010140403 is 304041010651161.

161156010140403 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.

It is a cyclic number.

It is not a de Polignac number, because 161156010140403 - 2² = 161156010140399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161156010142403) 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, 26859335023398 + ... + 26859335023403.

It is an arithmetic number, because the mean of its divisors is an integer number (53718670046802).

Almost surely, 2^{161156010140403} is an apocalyptic number.

161156010140403 is a deficient number, since it is larger than the sum of its proper divisors (53718670046805).

161156010140403 is an equidigital number, since it uses as much as digits as its factorization.

161156010140403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53718670046804.

The product of its (nonzero) digits is 8640, while the sum is 33.

Adding to 161156010140403 its reverse (304041010651161), we get a palindrome (465197020791564).

The spelling of 161156010140403 in words is "one hundred sixty-one trillion, one hundred fifty-six billion, ten million, one hundred forty thousand, four hundred three".