40688137987 has 32 divisors (see below), whose sum is σ = 47798784000. Its totient is φ = 34620080544.

The previous prime is 40688137927. The next prime is 40688137999. The reversal of 40688137987 is 78973188604.

It is not a de Polignac number, because 40688137987 - 2¹⁹ = 40687613699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40688137927) 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 31 ways as a sum of consecutive naturals, for example, 33106089 + ... + 33107317.

It is an arithmetic number, because the mean of its divisors is an integer number (1493712000).

Almost surely, 2^40688137987 is an apocalyptic number.

40688137987 is a deficient number, since it is larger than the sum of its proper divisors (7110646013).

40688137987 is a wasteful number, since it uses less digits than its factorization.

40688137987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880 (or 1866 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 61.

The spelling of 40688137987 in words is "forty billion, six hundred eighty-eight million, one hundred thirty-seven thousand, nine hundred eighty-seven".