40447887018386 has 4 divisors (see below), whose sum is σ = 60671830527582. Its totient is φ = 20223943509192.

The previous prime is 40447887018367. The next prime is 40447887018403. The reversal of 40447887018386 is 68381078874404.

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., 38396847717361 + 2051039301025 = 6196519^2 + 1432145^2 .

It is a super-2 number, since 2×40447887018386² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111971754595 + ... + 10111971754598.

Almost surely, 2^{40447887018386} is an apocalyptic number.

40447887018386 is a deficient number, since it is larger than the sum of its proper divisors (20223943509196).

40447887018386 is a wasteful number, since it uses less digits than its factorization.

40447887018386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20223943509195.

The product of its (nonzero) digits is 231211008, while the sum is 68.

The spelling of 40447887018386 in words is "forty trillion, four hundred forty-seven billion, eight hundred eighty-seven million, eighteen thousand, three hundred eighty-six".