161401143941 has 4 divisors (see below), whose sum is σ = 161552980512. Its totient is φ = 161249307372.

The previous prime is 161401143913. The next prime is 161401143949. The reversal of 161401143941 is 149341104161.

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 161401143941 - 2²⁶ = 161334035077 is a prime.

It is a super-2 number, since 2×161401143941² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161401143949) 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, 75916691 + ... + 75918816.

It is an arithmetic number, because the mean of its divisors is an integer number (40388245128).

Almost surely, 2^161401143941 is an apocalyptic number.

It is an amenable number.

161401143941 is a deficient number, since it is larger than the sum of its proper divisors (151836571).

161401143941 is a wasteful number, since it uses less digits than its factorization.

161401143941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151836570.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 161401143941 in words is "one hundred sixty-one billion, four hundred one million, one hundred forty-three thousand, nine hundred forty-one".