40187017661 has 8 divisors (see below), whose sum is σ = 45952119360. Its totient is φ = 34427940768.

The previous prime is 40187017639. The next prime is 40187017693. The reversal of 40187017661 is 16671078104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40187017661 - 2⁶ = 40187017597 is a prime.

It is a super-2 number, since 2×40187017661² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40187017631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1491896 + ... + 1518593.

It is an arithmetic number, because the mean of its divisors is an integer number (5744014920).

Almost surely, 2^40187017661 is an apocalyptic number.

It is an amenable number.

40187017661 is a deficient number, since it is larger than the sum of its proper divisors (5765101699).

40187017661 is a wasteful number, since it uses less digits than its factorization.

40187017661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3012403.

The product of its (nonzero) digits is 56448, while the sum is 41.

The spelling of 40187017661 in words is "forty billion, one hundred eighty-seven million, seventeen thousand, six hundred sixty-one".