40866507640 has 192 divisors, whose sum is σ = 115216680960. Its totient is φ = 12969411840.

The previous prime is 40866507631. The next prime is 40866507653. The reversal of 40866507640 is 4670566804.

It is a Harshad number since it is a multiple of its sum of digits (46).

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 47 ways as a sum of consecutive naturals, for example, 1382859 + ... + 1412101.

It is an arithmetic number, because the mean of its divisors is an integer number (600086880).

Almost surely, 2^40866507640 is an apocalyptic number.

40866507640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40866507640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57608340480).

40866507640 is an abundant number, since it is smaller than the sum of its proper divisors (74350173320).

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

40866507640 is a wasteful number, since it uses less digits than its factorization.

40866507640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29322 (or 29311 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 40866507640 in words is "forty billion, eight hundred sixty-six million, five hundred seven thousand, six hundred forty".