40220400220040 has 16 divisors (see below), whose sum is σ = 90495900495180. Its totient is φ = 16088160088000.

The previous prime is 40220400220031. The next prime is 40220400220069. The reversal of 40220400220040 is 4002200402204.

It can be written as a sum of positive squares in 2 ways, for example, as 36991672798084 + 3228727421956 = 6082078^2 + 1796866^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 40220400219994 and 40220400220021.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502755002711 + ... + 502755002790.

Almost surely, 2^{40220400220040} is an apocalyptic number.

40220400220040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40220400220040 is an abundant number, since it is smaller than the sum of its proper divisors (50275500275140).

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

40220400220040 is a wasteful number, since it uses less digits than its factorization.

40220400220040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005510005512 (or 1005510005508 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 40220400220040 its reverse (4002200402204), we get a palindrome (44222600622244).

The spelling of 40220400220040 in words is "forty trillion, two hundred twenty billion, four hundred million, two hundred twenty thousand, forty".