40145865167447 has 4 divisors (see below), whose sum is σ = 43234008641880. Its totient is φ = 37057721693016.

The previous prime is 40145865167399. The next prime is 40145865167467. The reversal of 40145865167447 is 74476156854104.

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

It is a cyclic number.

It is not a de Polignac number, because 40145865167447 - 2⁶ = 40145865167383 is a prime.

It is a super-2 number, since 2×40145865167447² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40145865167447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40145865167467) 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, 1544071737197 + ... + 1544071737222.

It is an arithmetic number, because the mean of its divisors is an integer number (10808502160470).

Almost surely, 2^{40145865167447} is an apocalyptic number.

40145865167447 is a deficient number, since it is larger than the sum of its proper divisors (3088143474433).

40145865167447 is a wasteful number, since it uses less digits than its factorization.

40145865167447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3088143474432.

The product of its (nonzero) digits is 90316800, while the sum is 62.

The spelling of 40145865167447 in words is "forty trillion, one hundred forty-five billion, eight hundred sixty-five million, one hundred sixty-seven thousand, four hundred forty-seven".