140808757561 has 2 divisors, whose sum is σ = 140808757562. Its totient is φ = 140808757560.

The previous prime is 140808757559. The next prime is 140808757591. The reversal of 140808757561 is 165757808041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117824681536 + 22984076025 = 343256^2 + 151605^2 .

It is a cyclic number.

It is not a de Polignac number, because 140808757561 - 2¹ = 140808757559 is a prime.

It is a super-3 number, since 3×140808757561³ (a number of 34 digits) contains 333 as substring.

Together with 140808757559, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 140808757499 and 140808757508.

It is not a weakly prime, because it can be changed into another prime (140808757511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70404378780 + 70404378781.

It is an arithmetic number, because the mean of its divisors is an integer number (70404378781).

Almost surely, 2^140808757561 is an apocalyptic number.

It is an amenable number.

140808757561 is a deficient number, since it is larger than the sum of its proper divisors (1).

140808757561 is an equidigital number, since it uses as much as digits as its factorization.

140808757561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1881600, while the sum is 52.

The spelling of 140808757561 in words is "one hundred forty billion, eight hundred eight million, seven hundred fifty-seven thousand, five hundred sixty-one".