40866649786494 has 160 divisors (see below), whose sum is σ = 107070522746880. Its totient is φ = 11409534070272.

The previous prime is 40866649786453. The next prime is 40866649786513. The reversal of 40866649786494 is 49468794666804.

It is a Smith number, since the sum of its digits (81) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 6338439 + ... + 11041245.

It is an arithmetic number, because the mean of its divisors is an integer number (669190767168).

Almost surely, 2^{40866649786494} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40866649786494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53535261373440).

40866649786494 is an abundant number, since it is smaller than the sum of its proper divisors (66203872960386).

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

40866649786494 is a wasteful number, since it uses less digits than its factorization.

40866649786494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4703004 (or 4702995 counting only the distinct ones).

The product of its (nonzero) digits is 12039487488, while the sum is 81.

The spelling of 40866649786494 in words is "forty trillion, eight hundred sixty-six billion, six hundred forty-nine million, seven hundred eighty-six thousand, four hundred ninety-four".