40857856866 has 40 divisors (see below), whose sum is σ = 92440755264. Its totient is φ = 13487054040.

The previous prime is 40857856829. The next prime is 40857856889. The reversal of 40857856866 is 66865875804.

40857856866 is a `hidden beast` number, since 4 + 0 + 8 + 5 + 7 + 8 + 568 + 66 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1207630 + ... + 1241001.

Almost surely, 2^40857856866 is an apocalyptic number.

40857856866 is an abundant number, since it is smaller than the sum of its proper divisors (51582898398).

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

40857856866 is a wasteful number, since it uses less digits than its factorization.

40857856866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448748 (or 2448739 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 63.

The spelling of 40857856866 in words is "forty billion, eight hundred fifty-seven million, eight hundred fifty-six thousand, eight hundred sixty-six".