40021040687 has 2 divisors, whose sum is σ = 40021040688. Its totient is φ = 40021040686.

The previous prime is 40021040677. The next prime is 40021040693. The reversal of 40021040687 is 78604012004.

40021040687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40021040687 - 2⁶ = 40021040623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40021040677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010520343 + 20010520344.

It is an arithmetic number, because the mean of its divisors is an integer number (20010520344).

Almost surely, 2^40021040687 is an apocalyptic number.

40021040687 is a deficient number, since it is larger than the sum of its proper divisors (1).

40021040687 is an equidigital number, since it uses as much as digits as its factorization.

40021040687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 32.

The spelling of 40021040687 in words is "forty billion, twenty-one million, forty thousand, six hundred eighty-seven".