40019771087 has 4 divisors (see below), whose sum is σ = 40020180816. Its totient is φ = 40019361360.

The previous prime is 40019771053. The next prime is 40019771089. The reversal of 40019771087 is 78017791004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40019771087 - 2⁸ = 40019770831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40019771089) 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, 36203 + ... + 285219.

It is an arithmetic number, because the mean of its divisors is an integer number (10005045204).

Almost surely, 2^40019771087 is an apocalyptic number.

40019771087 is a deficient number, since it is larger than the sum of its proper divisors (409729).

40019771087 is a wasteful number, since it uses less digits than its factorization.

40019771087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409728.

The product of its (nonzero) digits is 98784, while the sum is 44.

The spelling of 40019771087 in words is "forty billion, nineteen million, seven hundred seventy-one thousand, eighty-seven".