40391483985 has 12 divisors (see below), whose sum is σ = 70011905652. Its totient is φ = 21542124768.

The previous prime is 40391483969. The next prime is 40391483989. The reversal of 40391483985 is 58938419304.

40391483985 is a `hidden beast` number, since 40 + 39 + 1 + 483 + 98 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8687544849 + 31703939136 = 93207^2 + 178056^2 .

It is not a de Polignac number, because 40391483985 - 2⁴ = 40391483969 is a prime.

It is a super-2 number, since 2×40391483985² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40391483989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 448794222 + ... + 448794311.

It is an arithmetic number, because the mean of its divisors is an integer number (5834325471).

Almost surely, 2^40391483985 is an apocalyptic number.

40391483985 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40391483985 is a deficient number, since it is larger than the sum of its proper divisors (29620421667).

40391483985 is a wasteful number, since it uses less digits than its factorization.

40391483985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897588544 (or 897588541 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 40391483985 in words is "forty billion, three hundred ninety-one million, four hundred eighty-three thousand, nine hundred eighty-five".