40587684787 has 4 divisors (see below), whose sum is σ = 43709814400. Its totient is φ = 37465555176.

The previous prime is 40587684749. The next prime is 40587684791. The reversal of 40587684787 is 78748678504.

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 40587684787 - 2⁷ = 40587684659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40587684707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1561064787 + ... + 1561064812.

It is an arithmetic number, because the mean of its divisors is an integer number (10927453600).

Almost surely, 2^40587684787 is an apocalyptic number.

40587684787 is a deficient number, since it is larger than the sum of its proper divisors (3122129613).

40587684787 is a wasteful number, since it uses less digits than its factorization.

40587684787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3122129612.

The product of its (nonzero) digits is 84295680, while the sum is 64.

The spelling of 40587684787 in words is "forty billion, five hundred eighty-seven million, six hundred eighty-four thousand, seven hundred eighty-seven".