40198199665 has 16 divisors (see below), whose sum is σ = 51954739200. Its totient is φ = 29681226432.

The previous prime is 40198199647. The next prime is 40198199683. The reversal of 40198199665 is 56699189104.

It is an interprime number because it is at equal distance from previous prime (40198199647) and next prime (40198199683).

It is not a de Polignac number, because 40198199665 - 2⁵ = 40198199633 is a prime.

It is a super-4 number, since 4×40198199665⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 580776 + ... + 646294.

It is an arithmetic number, because the mean of its divisors is an integer number (3247171200).

Almost surely, 2^40198199665 is an apocalyptic number.

It is an amenable number.

40198199665 is a deficient number, since it is larger than the sum of its proper divisors (11756539535).

40198199665 is a wasteful number, since it uses less digits than its factorization.

40198199665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74976.

The product of its (nonzero) digits is 4199040, while the sum is 58.

The spelling of 40198199665 in words is "forty billion, one hundred ninety-eight million, one hundred ninety-nine thousand, six hundred sixty-five".