40687388387 has 4 divisors (see below), whose sum is σ = 41354394816. Its totient is φ = 40020381960.

The previous prime is 40687388383. The next prime is 40687388389. The reversal of 40687388387 is 78388378604.

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

It is a cyclic number.

It is not a de Polignac number, because 40687388387 - 2² = 40687388383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40687388383) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 333503123 + ... + 333503244.

It is an arithmetic number, because the mean of its divisors is an integer number (10338598704).

Almost surely, 2^40687388387 is an apocalyptic number.

40687388387 is a deficient number, since it is larger than the sum of its proper divisors (667006429).

40687388387 is an equidigital number, since it uses as much as digits as its factorization.

40687388387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667006428.

The product of its (nonzero) digits is 43352064, while the sum is 62.

The spelling of 40687388387 in words is "forty billion, six hundred eighty-seven million, three hundred eighty-eight thousand, three hundred eighty-seven".