1581422064408 has 48 divisors (see below), whose sum is σ = 4508440099800. Its totient is φ = 499396440960.

The previous prime is 1581422064401. The next prime is 1581422064419. The reversal of 1581422064408 is 8044602241851.

1581422064408 is a `hidden beast` number, since 1 + 5 + 8 + 14 + 220 + 6 + 4 + 408 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1581422064401) 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 11 ways as a sum of consecutive naturals, for example, 578003773 + ... + 578006508.

Almost surely, 2^{1581422064408} is an apocalyptic number.

1581422064408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1581422064408 is an abundant number, since it is smaller than the sum of its proper divisors (2927018035392).

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

1581422064408 is a wasteful number, since it uses less digits than its factorization.

1581422064408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156010312 (or 1156010305 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 45.

The spelling of 1581422064408 in words is "one trillion, five hundred eighty-one billion, four hundred twenty-two million, sixty-four thousand, four hundred eight".