40155343465 has 4 divisors (see below), whose sum is σ = 48186412164. Its totient is φ = 32124274768.

The previous prime is 40155343463. The next prime is 40155343511. The reversal of 40155343465 is 56434355104.

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 29910664809 + 10244678656 = 172947^2 + 101216^2 .

It is a cyclic number.

It is not a de Polignac number, because 40155343465 - 2¹ = 40155343463 is a prime.

It is a super-2 number, since 2×40155343465² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40155343463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4015534342 + ... + 4015534351.

It is an arithmetic number, because the mean of its divisors is an integer number (12046603041).

Almost surely, 2^40155343465 is an apocalyptic number.

It is an amenable number.

40155343465 is a deficient number, since it is larger than the sum of its proper divisors (8031068699).

40155343465 is an equidigital number, since it uses as much as digits as its factorization.

40155343465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8031068698.

The product of its (nonzero) digits is 432000, while the sum is 40.

Adding to 40155343465 its reverse (56434355104), we get a palindrome (96589698569).

The spelling of 40155343465 in words is "forty billion, one hundred fifty-five million, three hundred forty-three thousand, four hundred sixty-five".