1325621619 has 64 divisors (see below), whose sum is σ = 2292956160. Its totient is φ = 750578400.

The previous prime is 1325621603. The next prime is 1325621623. The reversal of 1325621619 is 9161265231.

1325621619 is a `hidden beast` number, since 1 + 3 + 25 + 621 + 6 + 1 + 9 = 666.

It is not a de Polignac number, because 1325621619 - 2⁴ = 1325621603 is a prime.

It is a super-2 number, since 2×1325621619² = 3514545353520362322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1325621119) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2005149 + ... + 2005809.

It is an arithmetic number, because the mean of its divisors is an integer number (35827440).

Almost surely, 2^1325621619 is an apocalyptic number.

1325621619 is a deficient number, since it is larger than the sum of its proper divisors (967334541).

1325621619 is an frugal number, since it uses more digits than its factorization.

1325621619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820 (or 802 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 1325621619 is about 36409.0870388149. The cubic root of 1325621619 is about 1098.5163521404.

The spelling of 1325621619 in words is "one billion, three hundred twenty-five million, six hundred twenty-one thousand, six hundred nineteen".