40244026640 has 20 divisors (see below), whose sum is σ = 93567362124. Its totient is φ = 16097610624.

The previous prime is 40244026639. The next prime is 40244026649. The reversal of 40244026640 is 4662044204.

40244026640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 14357790976 + 25886235664 = 119824^2 + 160892^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 40244026597 and 40244026606.

It is not an unprimeable number, because it can be changed into a prime (40244026649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251525087 + ... + 251525246.

Almost surely, 2^40244026640 is an apocalyptic number.

40244026640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40244026640 is an abundant number, since it is smaller than the sum of its proper divisors (53323335484).

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

40244026640 is a wasteful number, since it uses less digits than its factorization.

40244026640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503050346 (or 503050340 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

The spelling of 40244026640 in words is "forty billion, two hundred forty-four million, twenty-six thousand, six hundred forty".