619923171904 has 21 divisors (see below), whose sum is σ = 1230172543587. Its totient is φ = 309958436544.

The previous prime is 619923171811. The next prime is 619923171911. The reversal of 619923171904 is 409171329916.

The square root of 619923171904 is 787352.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6249607 + ... + 6348025.

Almost surely, 2^619923171904 is an apocalyptic number.

619923171904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

619923171904 is the 787352-nd square number.

It is an amenable number.

619923171904 is a deficient number, since it is larger than the sum of its proper divisors (610249371683).

619923171904 is an frugal number, since it uses more digits than its factorization.

619923171904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196850 (or 98421 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 52.

The spelling of 619923171904 in words is "six hundred nineteen billion, nine hundred twenty-three million, one hundred seventy-one thousand, nine hundred four".