619320206961 has 21 divisors (see below), whose sum is σ = 928587395401. Its totient is φ = 412865972532.

The previous prime is 619320206959. The next prime is 619320206971. The reversal of 619320206961 is 169602023916.

The square root of 619320206961 is 786969.

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

619320206961 is a `hidden beast` number, since 61 + 9 + 320 + 206 + 9 + 61 = 666.

It is not a de Polignac number, because 619320206961 - 2¹ = 619320206959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (619320206971) 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 20 ways as a sum of consecutive naturals, for example, 21233590 + ... + 21262736.

Almost surely, 2^619320206961 is an apocalyptic number.

619320206961 is the 786969-th square number.

619320206961 is the 393485-th centered octagonal number.

It is an amenable number.

619320206961 is a deficient number, since it is larger than the sum of its proper divisors (309267188440).

619320206961 is an frugal number, since it uses more digits than its factorization.

619320206961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58312 (or 29150 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

It can be divided in two parts, 619320 and 206961, that added together give a square (826281 = 909²).

The spelling of 619320206961 in words is "six hundred nineteen billion, three hundred twenty million, two hundred six thousand, nine hundred sixty-one".