619463561 has 4 divisors (see below), whose sum is σ = 655902612. Its totient is φ = 583024512.

The previous prime is 619463557. The next prime is 619463567. The reversal of 619463561 is 165364916.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 426670336 + 192793225 = 20656^2 + 13885^2 .

It is a cyclic number.

It is not a de Polignac number, because 619463561 - 2² = 619463557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (619463567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18219500 + ... + 18219533.

It is an arithmetic number, because the mean of its divisors is an integer number (163975653).

Almost surely, 2^619463561 is an apocalyptic number.

It is an amenable number.

619463561 is a deficient number, since it is larger than the sum of its proper divisors (36439051).

619463561 is a wasteful number, since it uses less digits than its factorization.

619463561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36439050.

The product of its digits is 116640, while the sum is 41.

The square root of 619463561 is about 24889.0249105906. The cubic root of 619463561 is about 852.4559012629.

The spelling of 619463561 in words is "six hundred nineteen million, four hundred sixty-three thousand, five hundred sixty-one".