140338511161 has 4 divisors (see below), whose sum is σ = 142986407652. Its totient is φ = 137690614672.

The previous prime is 140338511149. The next prime is 140338511213. The reversal of 140338511161 is 161115833041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161115833041 = 1291 ⋅124799251.

It can be written as a sum of positive squares in 2 ways, for example, as 69369551161 + 70968960000 = 263381^2 + 266400^2 .

It is a cyclic number.

It is not a de Polignac number, because 140338511161 - 2¹⁵ = 140338478393 is a prime.

It is a super-2 number, since 2×140338511161² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140338511101) 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, 1323948166 + ... + 1323948271.

It is an arithmetic number, because the mean of its divisors is an integer number (35746601913).

Almost surely, 2^140338511161 is an apocalyptic number.

It is an amenable number.

140338511161 is a deficient number, since it is larger than the sum of its proper divisors (2647896491).

140338511161 is an equidigital number, since it uses as much as digits as its factorization.

140338511161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647896490.

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 140338511161 in words is "one hundred forty billion, three hundred thirty-eight million, five hundred eleven thousand, one hundred sixty-one".