40205817212 has 24 divisors (see below), whose sum is σ = 76846616112. Its totient is φ = 18253929600.

The previous prime is 40205817149. The next prime is 40205817259. The reversal of 40205817212 is 21271850204.

40205817212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 498089 + ... + 573152.

It is an arithmetic number, because the mean of its divisors is an integer number (3201942338).

Almost surely, 2^40205817212 is an apocalyptic number.

It is an amenable number.

40205817212 is a deficient number, since it is larger than the sum of its proper divisors (36640798900).

40205817212 is a wasteful number, since it uses less digits than its factorization.

40205817212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072109 (or 1072107 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The spelling of 40205817212 in words is "forty billion, two hundred five million, eight hundred seventeen thousand, two hundred twelve".