140253603661 has 4 divisors (see below), whose sum is σ = 140486971324. Its totient is φ = 140020236000.

The previous prime is 140253603653. The next prime is 140253603671. The reversal of 140253603661 is 166306352041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 111495888100 + 28757715561 = 333910^2 + 169581^2 .

It is a cyclic number.

It is not a de Polignac number, because 140253603661 - 2³ = 140253603653 is a prime.

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 140253603661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140253603671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116682930 + ... + 116684131.

It is an arithmetic number, because the mean of its divisors is an integer number (35121742831).

Almost surely, 2^140253603661 is an apocalyptic number.

It is an amenable number.

140253603661 is a deficient number, since it is larger than the sum of its proper divisors (233367663).

140253603661 is an equidigital number, since it uses as much as digits as its factorization.

140253603661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233367662.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 140253603661 in words is "one hundred forty billion, two hundred fifty-three million, six hundred three thousand, six hundred sixty-one".