40105551110165 has 4 divisors (see below), whose sum is σ = 48126661332204. Its totient is φ = 32084440888128.

The previous prime is 40105551110161. The next prime is 40105551110173. The reversal of 40105551110165 is 56101115550104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15489128398129 + 24616422712036 = 3935623^2 + 4961494^2 .

It is a cyclic number.

It is not a de Polignac number, because 40105551110165 - 2² = 40105551110161 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40105551110161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4010555111012 + ... + 4010555111021.

It is an arithmetic number, because the mean of its divisors is an integer number (12031665333051).

Almost surely, 2^{40105551110165} is an apocalyptic number.

It is an amenable number.

40105551110165 is a deficient number, since it is larger than the sum of its proper divisors (8021110222039).

40105551110165 is an equidigital number, since it uses as much as digits as its factorization.

40105551110165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8021110222038.

The product of its (nonzero) digits is 15000, while the sum is 35.

Adding to 40105551110165 its reverse (56101115550104), we get a palindrome (96206666660269).

The spelling of 40105551110165 in words is "forty trillion, one hundred five billion, five hundred fifty-one million, one hundred ten thousand, one hundred sixty-five".