40558219668 has 96 divisors (see below), whose sum is σ = 109209139200. Its totient is φ = 13007396448.

The previous prime is 40558219657. The next prime is 40558219687. The reversal of 40558219668 is 86691285504.

40558219668 is a `hidden beast` number, since 4 + 0 + 558 + 21 + 9 + 6 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 231771 + ... + 367197.

It is an arithmetic number, because the mean of its divisors is an integer number (1137595200).

Almost surely, 2^40558219668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40558219668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54604569600).

40558219668 is an abundant number, since it is smaller than the sum of its proper divisors (68650919532).

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

40558219668 is a wasteful number, since it uses less digits than its factorization.

40558219668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135546 (or 135538 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 40558219668 in words is "forty billion, five hundred fifty-eight million, two hundred nineteen thousand, six hundred sixty-eight".