240905566188061 has 2 divisors, whose sum is σ = 240905566188062. Its totient is φ = 240905566188060.

The previous prime is 240905566188041. The next prime is 240905566188073. The reversal of 240905566188061 is 160881665509042.

240905566188061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165276993120100 + 75628573067961 = 12856010^2 + 8696469^2 .

It is a cyclic number.

It is not a de Polignac number, because 240905566188061 - 2¹⁷ = 240905566056989 is a prime.

It is a super-3 number, since 3×240905566188061³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240905566188011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120452783094030 + 120452783094031.

It is an arithmetic number, because the mean of its divisors is an integer number (120452783094031).

Almost surely, 2^{240905566188061} is an apocalyptic number.

It is an amenable number.

240905566188061 is a deficient number, since it is larger than the sum of its proper divisors (1).

240905566188061 is an equidigital number, since it uses as much as digits as its factorization.

240905566188061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24883200, while the sum is 61.

The spelling of 240905566188061 in words is "two hundred forty trillion, nine hundred five billion, five hundred sixty-six million, one hundred eighty-eight thousand, sixty-one".