544623140161 has 4 divisors (see below), whose sum is σ = 544814171824. Its totient is φ = 544432108500.

The previous prime is 544623140147. The next prime is 544623140177. The reversal of 544623140161 is 161041326445.

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 544623140161 - 2¹⁵ = 544623107393 is a prime.

It is a super-2 number, since 2×544623140161² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 544623140161.

It is not an unprimeable number, because it can be changed into a prime (544623140461) 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, 95511555 + ... + 95517256.

It is an arithmetic number, because the mean of its divisors is an integer number (136203542956).

Almost surely, 2^544623140161 is an apocalyptic number.

It is an amenable number.

544623140161 is a deficient number, since it is larger than the sum of its proper divisors (191031663).

544623140161 is a wasteful number, since it uses less digits than its factorization.

544623140161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191031662.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 544623140161 in words is "five hundred forty-four billion, six hundred twenty-three million, one hundred forty thousand, one hundred sixty-one".