40681611 has 12 divisors (see below), whose sum is σ = 60350992. Its totient is φ = 26387856.

The previous prime is 40681591. The next prime is 40681637. The reversal of 40681611 is 11618604.

40681611 is a `hidden beast` number, since 40 + 6 + 8 + 1 + 611 = 666.

It is not a de Polignac number, because 40681611 - 2¹⁴ = 40665227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40681661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60751 + ... + 61416.

Almost surely, 2^40681611 is an apocalyptic number.

40681611 is a deficient number, since it is larger than the sum of its proper divisors (19669381).

40681611 is a wasteful number, since it uses less digits than its factorization.

40681611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122210 (or 122207 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 40681611 is about 6378.2137781671. The cubic root of 40681611 is about 343.9268227029.

The spelling of 40681611 in words is "forty million, six hundred eighty-one thousand, six hundred eleven".