40041720518 has 4 divisors (see below), whose sum is σ = 60062580780. Its totient is φ = 20020860258.

The previous prime is 40041720463. The next prime is 40041720553. The reversal of 40041720518 is 81502714004.

It is a happy number.

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, 10010430128 + ... + 10010430131.

It is an arithmetic number, because the mean of its divisors is an integer number (15015645195).

Almost surely, 2^40041720518 is an apocalyptic number.

40041720518 is a deficient number, since it is larger than the sum of its proper divisors (20020860262).

40041720518 is a wasteful number, since it uses less digits than its factorization.

40041720518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20020860261.

The product of its (nonzero) digits is 8960, while the sum is 32.

The spelling of 40041720518 in words is "forty billion, forty-one million, seven hundred twenty thousand, five hundred eighteen".