40317207987 has 18 divisors (see below), whose sum is σ = 62536588524. Its totient is φ = 23037013440.

The previous prime is 40317207949. The next prime is 40317208003. The reversal of 40317207987 is 78970271304.

It is not a de Polignac number, because 40317207987 - 2¹¹ = 40317205939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40317207937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2426187 + ... + 2442747.

It is an arithmetic number, because the mean of its divisors is an integer number (3474254918).

Almost surely, 2^40317207987 is an apocalyptic number.

40317207987 is a deficient number, since it is larger than the sum of its proper divisors (22219380537).

40317207987 is an frugal number, since it uses more digits than its factorization.

40317207987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33139 (or 16571 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 48.

Multiplying 40317207987 by its sum of digits (48), we get a square (1935225983376 = 1391124²).

The spelling of 40317207987 in words is "forty billion, three hundred seventeen million, two hundred seven thousand, nine hundred eighty-seven".