161247786111213 has 4 divisors (see below), whose sum is σ = 214997048148288. Its totient is φ = 107498524074140.

The previous prime is 161247786111157. The next prime is 161247786111233. The reversal of 161247786111213 is 312111687742161.

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 161247786111213 - 2⁶ = 161247786111149 is a prime.

It is a super-2 number, since 2×161247786111213² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161247786111233) 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, 26874631018533 + ... + 26874631018538.

It is an arithmetic number, because the mean of its divisors is an integer number (53749262037072).

Almost surely, 2^{161247786111213} is an apocalyptic number.

It is an amenable number.

161247786111213 is a deficient number, since it is larger than the sum of its proper divisors (53749262037075).

161247786111213 is an equidigital number, since it uses as much as digits as its factorization.

161247786111213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53749262037074.

The product of its digits is 677376, while the sum is 51.

The spelling of 161247786111213 in words is "one hundred sixty-one trillion, two hundred forty-seven billion, seven hundred eighty-six million, one hundred eleven thousand, two hundred thirteen".