40042640068828 has 6 divisors (see below), whose sum is σ = 70074620120456. Its totient is φ = 20021320034412.

The previous prime is 40042640068811. The next prime is 40042640068861. The reversal of 40042640068828 is 82886004624004.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005330008600 + ... + 5005330008607.

Almost surely, 2^{40042640068828} is an apocalyptic number.

It is an amenable number.

40042640068828 is a deficient number, since it is larger than the sum of its proper divisors (30031980051628).

40042640068828 is a wasteful number, since it uses less digits than its factorization.

40042640068828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010660017211 (or 10010660017209 counting only the distinct ones).

The product of its (nonzero) digits is 4718592, while the sum is 52.

The spelling of 40042640068828 in words is "forty trillion, forty-two billion, six hundred forty million, sixty-eight thousand, eight hundred twenty-eight".