240478570681 has 2 divisors, whose sum is σ = 240478570682. Its totient is φ = 240478570680.

The previous prime is 240478570649. The next prime is 240478570699. The reversal of 240478570681 is 186075874042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187631917225 + 52846653456 = 433165^2 + 229884^2 .

It is a cyclic number.

It is not a de Polignac number, because 240478570681 - 2⁵ = 240478570649 is a prime.

It is a super-2 number, since 2×240478570681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (240478570481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120239285340 + 120239285341.

It is an arithmetic number, because the mean of its divisors is an integer number (120239285341).

Almost surely, 2^240478570681 is an apocalyptic number.

It is an amenable number.

240478570681 is a deficient number, since it is larger than the sum of its proper divisors (1).

240478570681 is an equidigital number, since it uses as much as digits as its factorization.

240478570681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3010560, while the sum is 52.

The spelling of 240478570681 in words is "two hundred forty billion, four hundred seventy-eight million, five hundred seventy thousand, six hundred eighty-one".