40661913599 has 8 divisors (see below), whose sum is σ = 40944823920. Its totient is φ = 40379553856.

The previous prime is 40661913587. The next prime is 40661913619. The reversal of 40661913599 is 99531916604.

It is a happy number.

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 40661913599 - 2¹² = 40661909503 is a prime.

It is a super-2 number, since 2×40661913599² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40661913599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40661910599) 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, 11132 + ... + 285390.

It is an arithmetic number, because the mean of its divisors is an integer number (5118102990).

Almost surely, 2^40661913599 is an apocalyptic number.

40661913599 is a deficient number, since it is larger than the sum of its proper divisors (282910321).

40661913599 is a wasteful number, since it uses less digits than its factorization.

40661913599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275289.

The product of its (nonzero) digits is 1574640, while the sum is 53.

The spelling of 40661913599 in words is "forty billion, six hundred sixty-one million, nine hundred thirteen thousand, five hundred ninety-nine".