3581816039540 has 24 divisors (see below), whose sum is σ = 7917698614560. Its totient is φ = 1357319762208.

The previous prime is 3581816039539. The next prime is 3581816039551. The reversal of 3581816039540 is 459306181853.

It is a happy number.

It is a super-2 number, since 2×3581816039540² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4712915462 + ... + 4712916221.

It is an arithmetic number, because the mean of its divisors is an integer number (329904108940).

Almost surely, 2^{3581816039540} is an apocalyptic number.

It is an amenable number.

3581816039540 is an abundant number, since it is smaller than the sum of its proper divisors (4335882575020).

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

3581816039540 is a wasteful number, since it uses less digits than its factorization.

3581816039540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9425831711 (or 9425831709 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 3581816039540 in words is "three trillion, five hundred eighty-one billion, eight hundred sixteen million, thirty-nine thousand, five hundred forty".