40864421989 has 16 divisors (see below), whose sum is σ = 42171259392. Its totient is φ = 39576963328.

The previous prime is 40864421963. The next prime is 40864421999. The reversal of 40864421989 is 98912446804.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 40864421989 - 2⁵ = 40864421957 is a prime.

It is a super-2 number, since 2×40864421989² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40864421999) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3462192 + ... + 3473974.

It is an arithmetic number, because the mean of its divisors is an integer number (2635703712).

Almost surely, 2^40864421989 is an apocalyptic number.

It is an amenable number.

40864421989 is a deficient number, since it is larger than the sum of its proper divisors (1306837403).

40864421989 is a wasteful number, since it uses less digits than its factorization.

40864421989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12596.

The product of its (nonzero) digits is 3981312, while the sum is 55.

The spelling of 40864421989 in words is "forty billion, eight hundred sixty-four million, four hundred twenty-one thousand, nine hundred eighty-nine".