140115206405 has 16 divisors (see below), whose sum is σ = 178506062064. Its totient is φ = 105215646720.

The previous prime is 140115206383. The next prime is 140115206423. The reversal of 140115206405 is 504602511041.

It can be written as a sum of positive squares in 8 ways, for example, as 7070455396 + 133044751009 = 84086^2 + 364753^2 .

It is not a de Polignac number, because 140115206405 - 2⁸ = 140115206149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2177966 + ... + 2241375.

It is an arithmetic number, because the mean of its divisors is an integer number (11156628879).

Almost surely, 2^140115206405 is an apocalyptic number.

It is an amenable number.

140115206405 is a deficient number, since it is larger than the sum of its proper divisors (38390855659).

140115206405 is a wasteful number, since it uses less digits than its factorization.

140115206405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4419736.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 140115206405 its reverse (504602511041), we get a palindrome (644717717446).

The spelling of 140115206405 in words is "one hundred forty billion, one hundred fifteen million, two hundred six thousand, four hundred five".