40685677791 has 24 divisors (see below), whose sum is σ = 60174594480. Its totient is φ = 24431742720.

The previous prime is 40685677763. The next prime is 40685677807. The reversal of 40685677791 is 19777658604.

It is not a de Polignac number, because 40685677791 - 2¹⁰ = 40685676767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40685677691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 474570 + ... + 553703.

It is an arithmetic number, because the mean of its divisors is an integer number (2507274770).

Almost surely, 2^40685677791 is an apocalyptic number.

40685677791 is a deficient number, since it is larger than the sum of its proper divisors (19488916689).

40685677791 is a wasteful number, since it uses less digits than its factorization.

40685677791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028407 (or 1028396 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 60.

The spelling of 40685677791 in words is "forty billion, six hundred eighty-five million, six hundred seventy-seven thousand, seven hundred ninety-one".