1581038055620 has 48 divisors (see below), whose sum is σ = 3467709766080. Its totient is φ = 604893700224.

The previous prime is 1581038055607. The next prime is 1581038055629. The reversal of 1581038055620 is 265508301851.

It is not an unprimeable number, because it can be changed into a prime (1581038055629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18062594 + ... + 18149913.

It is an arithmetic number, because the mean of its divisors is an integer number (72243953460).

Almost surely, 2^{1581038055620} is an apocalyptic number.

1581038055620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1581038055620 is an abundant number, since it is smaller than the sum of its proper divisors (1886671710460).

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

1581038055620 is a wasteful number, since it uses less digits than its factorization.

1581038055620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36212612 (or 36212610 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 44.

The spelling of 1581038055620 in words is "one trillion, five hundred eighty-one billion, thirty-eight million, fifty-five thousand, six hundred twenty".