40008609406 has 4 divisors (see below), whose sum is σ = 60012914112. Its totient is φ = 20004304702.

The previous prime is 40008609391. The next prime is 40008609451. The reversal of 40008609406 is 60490680004.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002152350 + ... + 10002152353.

It is an arithmetic number, because the mean of its divisors is an integer number (15003228528).

Almost surely, 2^40008609406 is an apocalyptic number.

40008609406 is a deficient number, since it is larger than the sum of its proper divisors (20004304706).

40008609406 is a wasteful number, since it uses less digits than its factorization.

40008609406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20004304705.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 40008609406 in words is "forty billion, eight million, six hundred nine thousand, four hundred six".