40145204556 has 24 divisors (see below), whose sum is σ = 104080160240. Its totient is φ = 13381734816.

The previous prime is 40145204543. The next prime is 40145204599. The reversal of 40145204556 is 65540254104.

40145204556 is a `hidden beast` number, since 40 + 1 + 4 + 520 + 45 + 56 = 666.

40145204556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×40145204556³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 40145204556.

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, 185857321 + ... + 185857536.

Almost surely, 2^40145204556 is an apocalyptic number.

It is an amenable number.

40145204556 is an abundant number, since it is smaller than the sum of its proper divisors (63934955684).

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

40145204556 is a wasteful number, since it uses less digits than its factorization.

40145204556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371714870 (or 371714862 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 40145204556 in words is "forty billion, one hundred forty-five million, two hundred four thousand, five hundred fifty-six".