40642433764 has 24 divisors (see below), whose sum is σ = 72397853528. Its totient is φ = 19959644160.

The previous prime is 40642433761. The next prime is 40642433831. The reversal of 40642433764 is 46733424604.

It can be written as a sum of positive squares in 4 ways, for example, as 14595056100 + 26047377664 = 120810^2 + 161392^2 .

It is a super-2 number, since 2×40642433764² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40642433764.

It is not an unprimeable number, because it can be changed into a prime (40642433761) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 218397 + ... + 359140.

Almost surely, 2^40642433764 is an apocalyptic number.

It is an amenable number.

40642433764 is a deficient number, since it is larger than the sum of its proper divisors (31755419764).

40642433764 is a wasteful number, since it uses less digits than its factorization.

40642433764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577855 (or 577853 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 43.

The spelling of 40642433764 in words is "forty billion, six hundred forty-two million, four hundred thirty-three thousand, seven hundred sixty-four".