1619661468 has 48 divisors (see below), whose sum is σ = 4032129024. Its totient is φ = 504241920.

The previous prime is 1619661457. The next prime is 1619661481. The reversal of 1619661468 is 8641669161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3580 + ... + 57027.

It is an arithmetic number, because the mean of its divisors is an integer number (84002688).

Almost surely, 2^1619661468 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1619661468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2016064512).

1619661468 is an abundant number, since it is smaller than the sum of its proper divisors (2412467556).

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

1619661468 is a wasteful number, since it uses less digits than its factorization.

1619661468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60762 (or 60760 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 1619661468 is about 40245.0179276889. The cubic root of 1619661468 is about 1174.3784775173.

The spelling of 1619661468 in words is "one billion, six hundred nineteen million, six hundred sixty-one thousand, four hundred sixty-eight".