40164321720 has 64 divisors (see below), whose sum is σ = 127580793120. Its totient is φ = 10080456704.

The previous prime is 40164321707. The next prime is 40164321721. The reversal of 40164321720 is 2712346104.

It is a super-2 number, since 2×40164321720² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40164321721) 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, 9842157 + ... + 9846236.

Almost surely, 2^40164321720 is an apocalyptic number.

40164321720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40164321720 is an abundant number, since it is smaller than the sum of its proper divisors (87416471400).

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

40164321720 is a wasteful number, since it uses less digits than its factorization.

40164321720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19688424 (or 19688420 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

Adding to 40164321720 its reverse (2712346104), we get a palindrome (42876667824).

The spelling of 40164321720 in words is "forty billion, one hundred sixty-four million, three hundred twenty-one thousand, seven hundred twenty".