40136877665018 has 4 divisors (see below), whose sum is σ = 60205316497530. Its totient is φ = 20068438832508.

The previous prime is 40136877664987. The next prime is 40136877665033. The reversal of 40136877665018 is 81056677863104.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 32025107219329 + 8111770445689 = 5659073^2 + 2848117^2 .

It is a super-2 number, since 2×40136877665018² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10034219416253 + ... + 10034219416256.

Almost surely, 2^{40136877665018} is an apocalyptic number.

40136877665018 is a deficient number, since it is larger than the sum of its proper divisors (20068438832512).

40136877665018 is a wasteful number, since it uses less digits than its factorization.

40136877665018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20068438832511.

The product of its (nonzero) digits is 40642560, while the sum is 62.

The spelling of 40136877665018 in words is "forty trillion, one hundred thirty-six billion, eight hundred seventy-seven million, six hundred sixty-five thousand, eighteen".