240998498261 has 2 divisors, whose sum is σ = 240998498262. Its totient is φ = 240998498260.

The previous prime is 240998498227. The next prime is 240998498269. The reversal of 240998498261 is 162894899042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150451670161 + 90546828100 = 387881^2 + 300910^2 .

It is a cyclic number.

It is not a de Polignac number, because 240998498261 - 2⁶ = 240998498197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 240998498194 and 240998498203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240998498269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120499249130 + 120499249131.

It is an arithmetic number, because the mean of its divisors is an integer number (120499249131).

Almost surely, 2^240998498261 is an apocalyptic number.

It is an amenable number.

240998498261 is a deficient number, since it is larger than the sum of its proper divisors (1).

240998498261 is an equidigital number, since it uses as much as digits as its factorization.

240998498261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17915904, while the sum is 62.

The spelling of 240998498261 in words is "two hundred forty billion, nine hundred ninety-eight million, four hundred ninety-eight thousand, two hundred sixty-one".