40078123085 has 32 divisors (see below), whose sum is σ = 64573431552. Its totient is φ = 23061934080.

The previous prime is 40078123009. The next prime is 40078123147. The reversal of 40078123085 is 58032187004.

It is not a de Polignac number, because 40078123085 - 2²² = 40073928781 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3998804 + ... + 4008813.

It is an arithmetic number, because the mean of its divisors is an integer number (2017919736).

Almost surely, 2^40078123085 is an apocalyptic number.

It is an amenable number.

40078123085 is a deficient number, since it is larger than the sum of its proper divisors (24495308467).

40078123085 is a wasteful number, since it uses less digits than its factorization.

40078123085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8007653.

The product of its (nonzero) digits is 53760, while the sum is 38.

The spelling of 40078123085 in words is "forty billion, seventy-eight million, one hundred twenty-three thousand, eighty-five".