40989631489 has 2 divisors, whose sum is σ = 40989631490. Its totient is φ = 40989631488.

The previous prime is 40989631483. The next prime is 40989631519. The reversal of 40989631489 is 98413698904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40282497025 + 707134464 = 200705^2 + 26592^2 .

It is a cyclic number.

It is not a de Polignac number, because 40989631489 - 2¹⁷ = 40989500417 is a prime.

It is not a weakly prime, because it can be changed into another prime (40989631483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20494815744 + 20494815745.

It is an arithmetic number, because the mean of its divisors is an integer number (20494815745).

Almost surely, 2^40989631489 is an apocalyptic number.

It is an amenable number.

40989631489 is a deficient number, since it is larger than the sum of its proper divisors (1).

40989631489 is an equidigital number, since it uses as much as digits as its factorization.

40989631489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13436928, while the sum is 61.

The spelling of 40989631489 in words is "forty billion, nine hundred eighty-nine million, six hundred thirty-one thousand, four hundred eighty-nine".