8361405259540 has 12 divisors (see below), whose sum is σ = 17558951045076. Its totient is φ = 3344562103808.

The previous prime is 8361405259477. The next prime is 8361405259541. The reversal of 8361405259540 is 459525041638.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1402793884816 + 6958611374724 = 1184396^2 + 2637918^2 .

It is a super-2 number, since 2×8361405259540² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8361405259541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209035131469 + ... + 209035131508.

It is an arithmetic number, because the mean of its divisors is an integer number (1463245920423).

Almost surely, 2^{8361405259540} is an apocalyptic number.

It is an amenable number.

8361405259540 is an abundant number, since it is smaller than the sum of its proper divisors (9197545785536).

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

8361405259540 is a wasteful number, since it uses less digits than its factorization.

8361405259540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418070262986 (or 418070262984 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 52.

The spelling of 8361405259540 in words is "eight trillion, three hundred sixty-one billion, four hundred five million, two hundred fifty-nine thousand, five hundred forty".