40008400063 has 4 divisors (see below), whose sum is σ = 40075868448. Its totient is φ = 39940931680.

The previous prime is 40008400057. The next prime is 40008400093. The reversal of 40008400063 is 36000480004.

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 40008400063 - 2²⁹ = 39471529151 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 (40008400093) 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, 33733303 + ... + 33734488.

It is an arithmetic number, because the mean of its divisors is an integer number (10018967112).

Almost surely, 2^40008400063 is an apocalyptic number.

40008400063 is a deficient number, since it is larger than the sum of its proper divisors (67468385).

40008400063 is an equidigital number, since it uses as much as digits as its factorization.

40008400063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67468384.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 40008400063 its reverse (36000480004), we get a palindrome (76008880067).

The spelling of 40008400063 in words is "forty billion, eight million, four hundred thousand, sixty-three".