219474440649 has 16 divisors (see below), whose sum is σ = 325159324800. Its totient is φ = 146310891408.

The previous prime is 219474440641. The next prime is 219474440657. The reversal of 219474440649 is 946044474912.

219474440649 is a `hidden beast` number, since 2 + 1 + 94 + 74 + 440 + 6 + 49 = 666.

It is an interprime number because it is at equal distance from previous prime (219474440641) and next prime (219474440657).

It is not a de Polignac number, because 219474440649 - 2³ = 219474440641 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 219474440595 and 219474440604.

It is not an unprimeable number, because it can be changed into a prime (219474440641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 677767 + ... + 947795.

It is an arithmetic number, because the mean of its divisors is an integer number (20322457800).

Almost surely, 2^219474440649 is an apocalyptic number.

It is an amenable number.

219474440649 is a deficient number, since it is larger than the sum of its proper divisors (105684884151).

219474440649 is a wasteful number, since it uses less digits than its factorization.

219474440649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300141 (or 300135 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 54.

The spelling of 219474440649 in words is "two hundred nineteen billion, four hundred seventy-four million, four hundred forty thousand, six hundred forty-nine".