619786180225 has 27 divisors (see below), whose sum is σ = 811210861827. Its totient is φ = 469676000880.

The previous prime is 619786180159. The next prime is 619786180243. The reversal of 619786180225 is 522081687916.

It is a happy number.

The square root of 619786180225 is 787265.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 223123024881 + 396663155344 = 472359^2 + 629812^2 .

It is not a de Polignac number, because 619786180225 - 2¹⁷ = 619786049153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 74786032 + ... + 74794318.

Almost surely, 2^619786180225 is an apocalyptic number.

619786180225 is the 787265-th square number.

619786180225 is the 393633-rd centered octagonal number.

It is an amenable number.

619786180225 is a deficient number, since it is larger than the sum of its proper divisors (191424681602).

619786180225 is an frugal number, since it uses more digits than its factorization.

619786180225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16622 (or 8311 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 619786180225 in words is "six hundred nineteen billion, seven hundred eighty-six million, one hundred eighty thousand, two hundred twenty-five".