919773355465 has 4 divisors (see below), whose sum is σ = 1103728026564. Its totient is φ = 735818684368.

The previous prime is 919773355453. The next prime is 919773355483. The reversal of 919773355465 is 564553377919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564553377919 = 238151 ⋅2370569.

It can be written as a sum of positive squares in 2 ways, for example, as 142605927424 + 777167428041 = 377632^2 + 881571^2 .

It is a cyclic number.

It is not a de Polignac number, because 919773355465 - 2⁹ = 919773354953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 919773355397 and 919773355406.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91977335542 + ... + 91977335551.

It is an arithmetic number, because the mean of its divisors is an integer number (275932006641).

Almost surely, 2^919773355465 is an apocalyptic number.

It is an amenable number.

919773355465 is a deficient number, since it is larger than the sum of its proper divisors (183954671099).

919773355465 is a wasteful number, since it uses less digits than its factorization.

919773355465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183954671098.

The product of its digits is 107163000, while the sum is 64.

The spelling of 919773355465 in words is "nine hundred nineteen billion, seven hundred seventy-three million, three hundred fifty-five thousand, four hundred sixty-five".