40618889894 has 32 divisors (see below), whose sum is σ = 67118388480. Its totient is φ = 18282477600.

The previous prime is 40618889891. The next prime is 40618889929. The reversal of 40618889894 is 49898881604.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 40618889894.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40618889891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4818167 + ... + 4826589.

It is an arithmetic number, because the mean of its divisors is an integer number (2097449640).

Almost surely, 2^40618889894 is an apocalyptic number.

40618889894 is a deficient number, since it is larger than the sum of its proper divisors (26499498586).

40618889894 is a wasteful number, since it uses less digits than its factorization.

40618889894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10556.

The product of its (nonzero) digits is 31850496, while the sum is 65.

The spelling of 40618889894 in words is "forty billion, six hundred eighteen million, eight hundred eighty-nine thousand, eight hundred ninety-four".