240054531061991 has 2 divisors, whose sum is σ = 240054531061992. Its totient is φ = 240054531061990.

The previous prime is 240054531061987. The next prime is 240054531062077. The reversal of 240054531061991 is 199160135450042.

240054531061991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240054531061991 - 2² = 240054531061987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240054531067991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120027265530995 + 120027265530996.

It is an arithmetic number, because the mean of its divisors is an integer number (120027265530996).

Almost surely, 2^{240054531061991} is an apocalyptic number.

240054531061991 is a deficient number, since it is larger than the sum of its proper divisors (1).

240054531061991 is an equidigital number, since it uses as much as digits as its factorization.

240054531061991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 240054531061991 in words is "two hundred forty trillion, fifty-four billion, five hundred thirty-one million, sixty-one thousand, nine hundred ninety-one".