161294335837 has 4 divisors (see below), whose sum is σ = 161296364320. Its totient is φ = 161292307356.

The previous prime is 161294335781. The next prime is 161294335847. The reversal of 161294335837 is 738533492161.

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: 738533492161 = 37 ⋅19960364653.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161294335837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161294335847) 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, 889887 + ... + 1055692.

It is an arithmetic number, because the mean of its divisors is an integer number (40324091080).

Almost surely, 2^161294335837 is an apocalyptic number.

It is an amenable number.

161294335837 is a deficient number, since it is larger than the sum of its proper divisors (2028483).

161294335837 is an equidigital number, since it uses as much as digits as its factorization.

161294335837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028482.

The product of its digits is 3265920, while the sum is 52.

The spelling of 161294335837 in words is "one hundred sixty-one billion, two hundred ninety-four million, three hundred thirty-five thousand, eight hundred thirty-seven".