40108378828665 has 32 divisors (see below), whose sum is σ = 73347458236416. Its totient is φ = 18333653227200.

The previous prime is 40108378828663. The next prime is 40108378828667. The reversal of 40108378828665 is 56682887380104.

It is an interprime number because it is at equal distance from previous prime (40108378828663) and next prime (40108378828667).

It is not a de Polignac number, because 40108378828665 - 2¹ = 40108378828663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40108378828596 and 40108378828605.

It is not an unprimeable number, because it can be changed into a prime (40108378828663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15520561 + ... + 17919390.

It is an arithmetic number, because the mean of its divisors is an integer number (2292108069888).

Almost surely, 2^{40108378828665} is an apocalyptic number.

It is an amenable number.

40108378828665 is a deficient number, since it is larger than the sum of its proper divisors (33239079407751).

40108378828665 is a wasteful number, since it uses less digits than its factorization.

40108378828665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33451389.

The product of its (nonzero) digits is 123863040, while the sum is 66.

The spelling of 40108378828665 in words is "forty trillion, one hundred eight billion, three hundred seventy-eight million, eight hundred twenty-eight thousand, six hundred sixty-five".