40247817521 has 16 divisors (see below), whose sum is σ = 41305904640. Its totient is φ = 39198646080.

The previous prime is 40247817473. The next prime is 40247817529. The reversal of 40247817521 is 12571874204.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40247817521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40247817529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8599460 + ... + 8604138.

It is an arithmetic number, because the mean of its divisors is an integer number (2581619040).

Almost surely, 2^40247817521 is an apocalyptic number.

It is an amenable number.

40247817521 is a deficient number, since it is larger than the sum of its proper divisors (1058087119).

40247817521 is a wasteful number, since it uses less digits than its factorization.

40247817521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5584.

The product of its (nonzero) digits is 125440, while the sum is 41.

The spelling of 40247817521 in words is "forty billion, two hundred forty-seven million, eight hundred seventeen thousand, five hundred twenty-one".