540640986649 has 16 divisors (see below), whose sum is σ = 587776435200. Its totient is φ = 495638372736.

The previous prime is 540640986631. The next prime is 540640986671. The reversal of 540640986649 is 946689046045.

It is not a de Polignac number, because 540640986649 - 2¹⁷ = 540640855577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540640986679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3603769 + ... + 3750790.

It is an arithmetic number, because the mean of its divisors is an integer number (36736027200).

Almost surely, 2^540640986649 is an apocalyptic number.

It is an amenable number.

540640986649 is a deficient number, since it is larger than the sum of its proper divisors (47135448551).

540640986649 is a wasteful number, since it uses less digits than its factorization.

540640986649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7354704.

The product of its (nonzero) digits is 44789760, while the sum is 61.

The spelling of 540640986649 in words is "five hundred forty billion, six hundred forty million, nine hundred eighty-six thousand, six hundred forty-nine".