140438610881 has 2 divisors, whose sum is σ = 140438610882. Its totient is φ = 140438610880.

The previous prime is 140438610863. The next prime is 140438610929. The reversal of 140438610881 is 188016834041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125889426481 + 14549184400 = 354809^2 + 120620^2 .

It is a cyclic number.

It is not a de Polignac number, because 140438610881 - 2⁶ = 140438610817 is a prime.

It is a super-2 number, since 2×140438610881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (140438610821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70219305440 + 70219305441.

It is an arithmetic number, because the mean of its divisors is an integer number (70219305441).

Almost surely, 2^140438610881 is an apocalyptic number.

It is an amenable number.

140438610881 is a deficient number, since it is larger than the sum of its proper divisors (1).

140438610881 is an equidigital number, since it uses as much as digits as its factorization.

140438610881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 44.

The spelling of 140438610881 in words is "one hundred forty billion, four hundred thirty-eight million, six hundred ten thousand, eight hundred eighty-one".