40978311685 has 8 divisors (see below), whose sum is σ = 49310951040. Its totient is φ = 32691331344.

The previous prime is 40978311683. The next prime is 40978311709. The reversal of 40978311685 is 58611387904.

40978311685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40978311685 - 2¹ = 40978311683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40978311683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11412777 + ... + 11416366.

It is an arithmetic number, because the mean of its divisors is an integer number (6163868880).

Almost surely, 2^40978311685 is an apocalyptic number.

It is an amenable number.

40978311685 is a deficient number, since it is larger than the sum of its proper divisors (8332639355).

40978311685 is a wasteful number, since it uses less digits than its factorization.

40978311685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22829507.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 40978311685 in words is "forty billion, nine hundred seventy-eight million, three hundred eleven thousand, six hundred eighty-five".