240861098981 has 2 divisors, whose sum is σ = 240861098982. Its totient is φ = 240861098980.

The previous prime is 240861098971. The next prime is 240861098999. The reversal of 240861098981 is 189890168042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214864696225 + 25996402756 = 463535^2 + 161234^2 .

It is a cyclic number.

It is not a de Polignac number, because 240861098981 - 2³⁴ = 223681229797 is a prime.

It is a super-2 number, since 2×240861098981² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240861098921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120430549490 + 120430549491.

It is an arithmetic number, because the mean of its divisors is an integer number (120430549491).

Almost surely, 2^240861098981 is an apocalyptic number.

It is an amenable number.

240861098981 is a deficient number, since it is larger than the sum of its proper divisors (1).

240861098981 is an equidigital number, since it uses as much as digits as its factorization.

240861098981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1990656, while the sum is 56.

The spelling of 240861098981 in words is "two hundred forty billion, eight hundred sixty-one million, ninety-eight thousand, nine hundred eighty-one".