40166973889 has 9 divisors (see below), whose sum is σ = 46726479201. Its totient is φ = 34427632260.

The previous prime is 40166973829. The next prime is 40166973929. The reversal of 40166973889 is 98837966104.

The square root of 40166973889 is 200417.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 40166973889 - 2⁹ = 40166973377 is a prime.

It is a super-2 number, since 2×40166973889² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40166973829) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1388604 + ... + 1417234.

Almost surely, 2^40166973889 is an apocalyptic number.

40166973889 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

40166973889 is the 200417-th square number.

40166973889 is the 100209-th centered octagonal number.

It is an amenable number.

40166973889 is a deficient number, since it is larger than the sum of its proper divisors (6559505312).

40166973889 is an frugal number, since it uses more digits than its factorization.

40166973889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57276 (or 28638 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 61.

The spelling of 40166973889 in words is "forty billion, one hundred sixty-six million, nine hundred seventy-three thousand, eight hundred eighty-nine".