40685351840 has 48 divisors (see below), whose sum is σ = 109850452992. Its totient is φ = 13949263104.

The previous prime is 40685351807. The next prime is 40685351867. The reversal of 40685351840 is 4815358604.

It is a junction number, because it is equal to n+sod(n) for n = 40685351791 and 40685351800.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18161984 + ... + 18164223.

It is an arithmetic number, because the mean of its divisors is an integer number (2288551104).

Almost surely, 2^40685351840 is an apocalyptic number.

40685351840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40685351840 is an abundant number, since it is smaller than the sum of its proper divisors (69165101152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40685351840 is a wasteful number, since it uses less digits than its factorization.

40685351840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36326229 (or 36326221 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 44.

The spelling of 40685351840 in words is "forty billion, six hundred eighty-five million, three hundred fifty-one thousand, eight hundred forty".