61040475410440 has 32 divisors (see below), whose sum is σ = 137360006086680. Its totient is φ = 24412823690752.

The previous prime is 61040475410417. The next prime is 61040475410441. The reversal of 61040475410440 is 4401457404016.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 61003629072324 + 36846338116 = 7810482^2 + 191954^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 61040475410393 and 61040475410402.

It is not an unprimeable number, because it can be changed into a prime (61040475410441) 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, 104908549 + ... + 105488788.

Almost surely, 2^{61040475410440} is an apocalyptic number.

It is an amenable number.

61040475410440 is an abundant number, since it is smaller than the sum of its proper divisors (76319530676240).

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

61040475410440 is a wasteful number, since it uses less digits than its factorization.

61040475410440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210404601 (or 210404597 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 40.

The spelling of 61040475410440 in words is "sixty-one trillion, forty billion, four hundred seventy-five million, four hundred ten thousand, four hundred forty".